chore(deps): update actions/checkout action to v6 (#57)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ExtensionTemplate.yml

@@ -31,7 +31,7 @@ jobs:
         shell: bash
         run: sudo apt-get update -y -qq && sudo apt-get install -y -qq ninja-build
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: 'recursive'
@@ -77,7 +77,7 @@ jobs:
         shell: bash
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: 'recursive'
@@ -128,7 +128,7 @@ jobs:
         shell: bash
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: 'recursive'