Change checkout action to specific commit version

Updated checkout action version to a specific commit.

Signed-off-by: Zack Koppert <zkoppert@github.com>

Author: zkoppert

.github/workflows/docker-image.yml

@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Build the Docker image