Add version comments to actions/checkout references

Co-authored-by: shenxianpeng <[email protected]>

Author: Copilot

.github/workflows/cpp-linter.yml

@@ -13,6 +13,7 @@ jobs:
   cpp-linter:
     runs-on: ubuntu-latest
     steps:
+      # v6.0.0
       - uses: actions/checkout@v6
       - uses: cpp-linter/cpp-linter-action@main
         id: linter

.github/workflows/examples/only-PR-comments.yml

@@ -13,6 +13,7 @@ jobs:
     permissions: # (1)!
       pull-requests: write
     steps:
+      # v5.0.1
       - uses: actions/checkout@v5
 
       # ... optionally setup build env to create a compilation database

.github/workflows/examples/only-clang-format.yml

@@ -11,6 +11,7 @@ jobs:
   cpp-linter:
     runs-on: ubuntu-latest
     steps:
+      # v5.0.1
       - uses: actions/checkout@v5
 
       # ... optionally setup build env to create a compilation database

.github/workflows/examples/only-clang-tidy.yml

@@ -11,6 +11,7 @@ jobs:
   cpp-linter:
     runs-on: ubuntu-latest
     steps:
+      # v5.0.1
       - uses: actions/checkout@v5
 
       # ... optionally setup build env to create a compilation database

.github/workflows/release.yml

@@ -22,6 +22,7 @@ jobs:
   re-tag:
     runs-on: ubuntu-latest
     steps:
+    # v6.0.0
     - uses: actions/checkout@v6
       with:
         fetch-depth: 0

.github/workflows/self-test.yml

@@ -39,6 +39,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
+        # v6.0.0
         uses: actions/checkout@v6
 
       - name: Cache the build artifacts