Apply suggestions from code review

Co-authored-by: Tom Martensen <[email protected]>

Author: robbycochran

.github/actions/build-and-push-image/action.yaml

@@ -10,7 +10,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Build and push x86_64 image
+    - name: Build and push ${{ inputs.arch }} image
       run: |
         .github/actions/build-and-push-image/build-and-push-image.sh \
           "${{ inputs.image-flavor }}" "${{ inputs.arch }}"

.github/actions/build-and-push-image/build-and-push-image.sh

@@ -7,7 +7,7 @@ build_and_push_image() {
     local target_arch="$2"
     local tag_suffix="-${target_arch}"
 
-    if [ -z $target_arch ]; then
+    if [ -z "${target_arch}" ]; then
         target_arch="amd64"
         tag_suffix=""
     fi