perf: rename pi_merge workflow

Author: andhreljaKern

.github/workflows/pi_merge.yml

@@ -1,4 +1,4 @@
-name: 'Parent Images: Submodules Merge'
+name: 'Parent Images: Parent Image Merge'
 
 on:
   workflow_dispatch:
@@ -12,7 +12,7 @@ permissions:
   actions: read
 
 jobs: 
-  call-pi-merge-submodule:
-    uses: code-kern-ai/cicd-deployment-scripts/.github/workflows/pi_merge_submodule.yml@dev
+  call-pi-merge-parent-image:
+    uses: code-kern-ai/cicd-deployment-scripts/.github/workflows/pi_merge_parent_image.yml@dev
     if: ${{ github.event.pull_request.merged }}
     secrets: inherit