Consistently format YAML and add CI check

.editorconfig

@@ -8,3 +8,6 @@ trim_trailing_whitespace = true
 [*.ts]
 indent_style = space
 indent_size = 2
+
+[*.(yml|yaml)]
+indent_size = 2

.github/ISSUE_TEMPLATE/config.yml

@@ -2,4 +2,4 @@ blank_issues_enabled: true
 contact_links:
   - name: Contact GitHub Support
     url: https://support.github.com/request
-    about: Contact Support 
+    about: Contact Support

.github/actions/check-codescanning-config/action.yml

@@ -1,7 +1,7 @@
 name: Check Code-Scanning Config
 description: |
-    Checks the code scanning configuration file generated by the
-    action to ensure it contains the expected contents
+  Checks the code scanning configuration file generated by the
+  action to ensure it contains the expected contents
 inputs:
   languages:
     required: false
@@ -52,7 +52,7 @@ runs:
         tools: ${{ inputs.tools }}
         db-location: ${{ runner.temp }}/codescanning-config-cli-test
       env:
-        CODEQL_ACTION_TEST_MODE: 'true'
+        CODEQL_ACTION_TEST_MODE: "true"
 
     - name: Install dependencies
       shell: bash
@@ -62,7 +62,7 @@ runs:
       working-directory: ${{ github.action_path }}
       shell: bash
       env:
-        EXPECTED_CONFIG_FILE_CONTENTS: '${{ inputs.expected-config-file-contents }}'
+        EXPECTED_CONFIG_FILE_CONTENTS: "${{ inputs.expected-config-file-contents }}"
       run: ts-node ./index.ts "$RUNNER_TEMP/user-config.yaml" "$EXPECTED_CONFIG_FILE_CONTENTS"
     - name: Clean up
       shell: bash

.github/actions/query-filter-test/action.yml

@@ -54,7 +54,7 @@ runs:
     - name: Check SARIF
       uses: ./../action/.github/actions/check-sarif
       with:
-        sarif-file:  ${{ inputs.sarif-file }}
+        sarif-file: ${{ inputs.sarif-file }}
         queries-run: ${{ inputs.queries-run}}
         queries-not-run: ${{ inputs.queries-not-run}}
     - name: Cleanup after test

.github/actions/release-branches/action.yml

@@ -1,11 +1,11 @@
-name: 'Release branches'
-description: 'Determine branches for release & backport'
+name: "Release branches"
+description: "Determine branches for release & backport"
 inputs:
   major_version:
-    description: 'The version as extracted from the package.json file'
+    description: "The version as extracted from the package.json file"
     required: true
   latest_tag:
-    description: 'The most recent tag published to the repository'
+    description: "The most recent tag published to the repository"
     required: true
 outputs:
   backport_source_branch:

.github/actions/release-initialise/action.yml

@@ -1,25 +1,24 @@
-name: 'Prepare release job'
-description: 'Prepare for updating a release branch'
+name: "Prepare release job"
+description: "Prepare for updating a release branch"
 
 runs:
   using: "composite"
   steps:
-
     - name: Dump environment
       run: env
       shell: bash
 
     - name: Dump GitHub context
       env:
-        GITHUB_CONTEXT: '${{ toJson(github) }}'
+        GITHUB_CONTEXT: "${{ toJson(github) }}"
       run: echo "$GITHUB_CONTEXT"
       shell: bash
 
     - name: Set up Node
       uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
       with:
         node-version: 24
-        cache: 'npm'
+        cache: "npm"
 
     - name: Install JavaScript dependencies
       shell: bash