fix: add checkout step to ensure repository is available for image build

Author: joshyorko

.github/workflows/build-kaniko-docker.yaml

@@ -32,6 +32,9 @@ jobs:
       packages: write          # push to GHCR
 
     steps:
+      
+      - name: Checkout repository
+        uses: actions/[email protected]
       - name: Build and Push Image to GHCR with kaniko
         env:
           GIT_USERNAME: ${{ github.actor }}