Add explicit dev branch ref to checkout steps in dev workflow

Co-authored-by: infinitycat233 <103594839+infinitycat233@users.noreply.github.com>

.github/workflows/docker-image-dev.yml

@@ -19,6 +19,7 @@ jobs:
       - name: Check out git repository
         uses: actions/checkout@v4
         with:
+          ref: dev
           fetch-depth: 0
 
       # Clone required dependencies
@@ -72,6 +73,7 @@ jobs:
       - name: Check out git repository
         uses: actions/checkout@v4
         with:
+          ref: dev
           fetch-depth: 0
 
       # Clone required dependencies