Use statically.io for the 1.13.x series doc archives

Reprise on 07cc415, omitted in ac4afe3.

index.html

@@ -2799,7 +2799,7 @@ <h2 id="notes">Notes</h2>
       <h2 id="changelog">Change Log</h2>
 
       <p id="1.13.1">
-        <b class="header">1.13.1</b> &mdash; <small><i>April 15, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0...1.13.1">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.1/index.html">Docs</a><br />
+        <b class="header">1.13.1</b> &mdash; <small><i>April 15, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0...1.13.1">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.1/index.html">Docs</a><br />
         <ul>
           <li>
             Restores the <tt>underscore.js</tt> alias committed to the GitHub
@@ -2815,7 +2815,7 @@ <h2 id="changelog">Change Log</h2>
       </p>
 
       <p id="1.13.0">
-        <b class="header">1.13.0</b> &mdash; <small><i>April 9, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-3...1.13.0">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0/index.html">Docs</a><br />
+        <b class="header">1.13.0</b> &mdash; <small><i>April 9, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-3...1.13.0">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.0/index.html">Docs</a><br />
         <ul>
           <li>
             Merges the changes from the 1.13.0-0 through 1.13.0-3 preview
@@ -2834,7 +2834,7 @@ <h2 id="changelog">Change Log</h2>
       </p>
 
       <p id="1.13.0-3">
-        <b class="header">1.13.0-3</b> &mdash; <small><i>March 31, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-2...1.13.0-3">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0-3/index.html">Docs</a><br />
+        <b class="header">1.13.0-3</b> &mdash; <small><i>March 31, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-2...1.13.0-3">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.0-3/index.html">Docs</a><br />
         <ul>
           <li>
             Adds a <tt>"module"</tt> exports condition to the
@@ -2849,7 +2849,7 @@ <h2 id="changelog">Change Log</h2>
       </p>
 
       <p id="1.13.0-2">
-        <b class="header">1.13.0-2</b> &mdash; <small><i>March 15, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-1...1.13.0-2">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0-2/index.html">Docs</a><br />
+        <b class="header">1.13.0-2</b> &mdash; <small><i>March 15, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-1...1.13.0-2">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.0-2/index.html">Docs</a><br />
         <ul>
           <li>
             Fixes the same security issue in <tt>_.template</tt> as the
@@ -2884,7 +2884,7 @@ <h2 id="changelog">Change Log</h2>
       </p>
 
       <p id="1.13.0-1">
-        <b class="header">1.13.0-1</b> &mdash; <small><i>March 11, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-0...1.13.0-1">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0-1/index.html">Docs</a><br />
+        <b class="header">1.13.0-1</b> &mdash; <small><i>March 11, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-0...1.13.0-1">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.0-1/index.html">Docs</a><br />
         <ul>
           <li>
             Fixes an issue that caused aliases to be absent among the named
@@ -2897,7 +2897,7 @@ <h2 id="changelog">Change Log</h2>
       </p>
 
       <p id="1.13.0-0">
-        <b class="header">1.13.0-0</b> &mdash; <small><i>March 9, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.12.0...1.13.0-0">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0-0/index.html">Docs</a><br />
+        <b class="header">1.13.0-0</b> &mdash; <small><i>March 9, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.12.0...1.13.0-0">Diff</a> &mdash; <a href="https://cdn.statically.io/gh/jashkenas/underscore/1.13.0-0/index.html">Docs</a><br />
         <ul>
           <li>
             Adds experimental support for native ESM imports in Node.js. You