enforce lower-case dev image name

action.yml

@@ -178,6 +178,12 @@ runs:
       with:
         string: ${{ inputs.image-name }}
 
+    - name: Enforce lower-case dev image name 
+      id: dev-image-name
+      uses: ASzc/change-string-case-action@v6
+      with:
+        string: ${{ inputs.dev-image-name }}
+
     - name: Build images
       id: build-images
       shell: bash
@@ -190,7 +196,7 @@ runs:
         COMMAND: ${{ inputs.command }}
         IMAGE_NAME: ${{ steps.image-name.outputs.lowercase }}
         IMAGE_TAG: ${{ inputs.image-tag }}
-        DEV_IMAGE_NAME: ${{ inputs.dev-image-name }}
+        DEV_IMAGE_NAME: ${{ steps.dev-image-name.outputs.lowercase }}
         DEV_IMAGE_TAG: ${{ inputs.dev-image-tag }}
         RMW_IMPLEMENTATION: ${{ inputs.rmw-implementation }}
         ROS_DISTRO: ${{ inputs.ros-distro }}