ci: use shallow clone in build-op-image workflow

Signed-off-by: Josh Baird <jbaird@galileo.io>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: joshuabaird

.github/workflows/build-op-image.yaml

@@ -62,7 +62,7 @@ jobs:
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ inputs.tag || github.ref }}
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Set version env for workflow_dispatch
         if: github.event_name == 'workflow_dispatch'