update external docs (#1709)

Co-authored-by: Create or Update Pull Request Action <create-or-update-pull-request@users.noreply.github.com>
expressjs · Dec 9, 2024 · a5de90b · a5de90b
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diff --git a/_data/express.yml b/_data/express.yml
@@ -1,2 +1,2 @@
-current_version: "4.21.1"
+current_version: "4.21.2"
 next_version: "5.0.1"
diff --git a/_includes/readmes/compression.md b/_includes/readmes/compression.md
@@ -139,6 +139,12 @@ The default value is `zlib.Z_DEFAULT_WINDOWBITS`, or `15`.
 See [Node.js documentation](http://nodejs.org/api/zlib.html#zlib_memory_usage_tuning)
 regarding the usage.
 
+##### enforceEncoding
+
+This is the default encoding to use when the client does not specify an encoding in the request's [Accept-Encoding](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding) header.
+
+The default value is `identity`.
+
 #### .filter
 
 The default `filter` function. This is used to construct a custom filter