Update administrate to version 0.20.1

Gemfile.lock

@@ -77,12 +77,12 @@ GEM
       tzinfo (~> 2.0)
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
-    administrate (0.19.0)
-      actionpack (>= 5.0)
-      actionview (>= 5.0)
-      activerecord (>= 5.0)
-      jquery-rails (>= 4.0)
-      kaminari (>= 1.0)
+    administrate (0.20.1)
+      actionpack (>= 6.0, < 8.0)
+      actionview (>= 6.0, < 8.0)
+      activerecord (>= 6.0, < 8.0)
+      jquery-rails (~> 4.6.0)
+      kaminari (~> 1.2.2)
       sassc-rails (~> 2.1)
       selectize-rails (~> 0.6)
     annotate (3.2.0)
@@ -391,7 +391,7 @@ GEM
       mini_portile2 (~> 2.8.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
-    thor (1.3.0)
+    thor (1.3.1)
     tilt (2.3.0)
     timecop (0.9.8)
     timeout (0.4.1)