chore(deps): update docker/build-push-action action to v6 (#206)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Tom <TommyE123@users.noreply.github.com>

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

@@ -66,7 +66,7 @@ jobs:
       # - 'latest' for successful builds on the main branch.
       # - '<short_branch_name>' pushes to non-main branches.
       - name: Build and push Docker image
-        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
+        uses: docker/build-push-action@1a162644f9a7e87d8f4b053101d1d9a712edc18c # v6.3.0
         with:
           context: .
           push: true