Bump rack from 2.2.4 to 2.2.6.2

Bumps [rack](https://github.com/rack/rack) from 2.2.4 to 2.2.6.2.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.4...v2.2.6.2)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ruby.yml

@@ -26,6 +26,10 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
+      - name: Hack sources.list
+        run: sudo sed -i 's|http://azure.archive.ubuntu.com/ubuntu/|http://mirror.arizona.edu/ubuntu/|g' /etc/apt/sources.list
+
       - name: config bundler
         run:  |
           bundle config set without 'development staging production'
@@ -35,6 +39,7 @@ jobs:
 
       - name: Install wkhtmlpdf (push)
         run: |
+          sudo apt-get update
           wget http://se.archive.ubuntu.com/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1_amd64.deb
           sudo dpkg -i libpng12-0_1.2.54-1ubuntu1_amd64.deb
           wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.xenial_amd64.deb

Gemfile.lock

@@ -214,7 +214,7 @@ GEM
     puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.1)
-    rack (2.2.4)
+    rack (2.2.6.2)
     rack-oauth2 (1.10.1)
       activesupport
       attr_required