Refactor update-submodules workflow to handle central branch and update components submodule

.github/workflows/update-submodules.yml

@@ -0,0 +1,40 @@
+
+name: Update Components Submodules
+
+on:
+  push:
+    branches:
+      - central
+  pull_request:
+    branches:
+      - central
+  workflow_dispatch:
+  workflow_call: # This is a custom event that we will trigger manually
+
+jobs:
+  update-submodules:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update submodules
+        run: |
+          # Only update the "components" submodule, we want to ignore l10n
+          git submodule update --init --recursive components
+          current_path=$(pwd)
+          submodule_path=$(git config --file .gitmodules --get-regexp path | awk '{ print $2 }' | grep components --color=never)
+          cd $submodule_path
+          git checkout master
+          git pull
+          cd $current_path
+        
+          git add .
+          git commit -m "[skip ci] 📦 Update Submodules!"
+          git push
+
+