Update actions versions to latest

Updates the commit reference for the `softprops/action-gh-release`
action to point to the latest released version.

Fixes an outdated "actions/checkout" version reference in an
agent skill definition, for consistency.

Author: data-douser

.github/actions/setup-codeql-environment/action.yml

@@ -82,7 +82,7 @@ runs:
     - name: Cache `gh-codeql` extension and CodeQL packages (Unix)
       id: cache-codeql-unix
       if: runner.os != 'Windows'
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: |
           ~/.local/share/gh-codeql
@@ -94,7 +94,7 @@ runs:
     - name: Cache `gh-codeql` extension and CodeQL packages (Windows)
       id: cache-codeql-windows
       if: runner.os == 'Windows'
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: |
           ~\AppData\Local\GitHub\gh-codeql
@@ -330,7 +330,7 @@ runs:
     - name: Cache language runtimes
       id: cache-runtimes
       if: inputs.install-language-runtimes == 'true'
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: |
           ~/go/pkg/mod
@@ -388,7 +388,7 @@ runs:
     - name: Cache .NET packages
       if: inputs.install-language-runtimes == 'true' && contains(inputs.languages, 'csharp')
       id: cache-dotnet-packages
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: |
           ~/.nuget/packages

.github/skills/add-mcp-support-for-new-language/workflow-template.yml

@@ -44,7 +44,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up CodeQL CLI
         uses: github/codeql-action/init@v3