Update files from .github to v0.8.16 [skip ci]

Author: sloshy

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.2
+          ruby-version: .ruby-version
       - name: Setup yq
         run: sudo snap install yq
       - name: Run pre-conditions

.github/workflows/docs.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.2
+          ruby-version: .ruby-version
       - name: Setup github-changelog-generator
         run: gem install github_changelog_generator -v 1.15.0
       - name: Setup yq

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.2
+          ruby-version: .ruby-version
       - name: Setup GPG
         uses: olafurpg/setup-gpg@v3
       - name: Setup yq