Add Jekyll 3.9.2 release post to 'master' branch (#9013)

Merge pull request 9013

History.markdown

@@ -429,6 +429,19 @@
 
   * Fix Kramdown converter based tests for v4.0.x (#8143)
 
+## 3.9.2 / 2022-03-27
+
+### Bug Fixes
+
+  * Lock `http_parser.rb` gem to `v0.6.x` on JRuby (#8943)
+  * Backport #8756 for v3.9.x: Respect collections_dir config within include tag (#8795)
+  * Backport #8965 for v3.9.x: Fix response header for content served via `jekyll serve` (#8976)
+
+### Development Fixes
+
+  * Update and fix CI for `3.9-stable` on Ruby 3.x (#8942)
+  * Fix CI for commits to `3.9-stable` branch (#8788)
+
 ## 3.9.1 / 2021-04-08
 
 ### Bug Fixes

docs/_docs/history.md

@@ -348,6 +348,23 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix Kramdown converter based tests for v4.0.x ([#8143]({{ site.repository }}/issues/8143))
 
 
+## 3.9.2 / 2022-03-27
+{: #v3-9-2}
+
+### Bug Fixes
+{: #bug-fixes-v3-9-2}
+
+- Lock `http_parser.rb` gem to `v0.6.x` on JRuby ([#8943]({{ site.repository }}/issues/8943))
+- Backport [#8756]({{ site.repository }}/issues/8756) for v3.9.x: Respect collections_dir config within include tag ([#8795]({{ site.repository }}/issues/8795))
+- Backport [#8965]({{ site.repository }}/issues/8965) for v3.9.x: Fix response header for content served via `jekyll serve` ([#8976]({{ site.repository }}/issues/8976))
+
+### Development Fixes
+{: #development-fixes-v3-9-2}
+
+- Update and fix CI for `3.9-stable` on Ruby 3.x ([#8942]({{ site.repository }}/issues/8942))
+- Fix CI for commits to `3.9-stable` branch ([#8788]({{ site.repository }}/issues/8788))
+
+
 ## 3.9.1 / 2021-04-08
 {: #v3-9-1}
 

docs/_posts/2022-03-27-jekyll-3-9-2-released.markdown

@@ -0,0 +1,19 @@
+---
+title: 'Jekyll 3.9.2 Released'
+date: 2022-03-27 13:20:00 -0700
+author: parkr
+version: 3.9.2
+categories: [release]
+---
+
+Hey Jekyllers,
+
+Quick bug-fix release for you all today:
+
+1. Ruby 3.0 and 3.1 support :tada: (you will need to run `bundle add webrick` for `jekyll serve` to work)
+2. `jekyll serve` will no longer inject a charset into the MIME type for
+binary types
+3. Incremental regeneration now handles includes in collection files
+   correctly
+
+That's all, Happy Jekylling!