.sync/codeql-platform.yml: Use GitHub TF-Hafnium mirrors (#542)

Replaces nested submodule URLs with GitHub mirrors to avoid issues with
git.trustedfirmware.org being down.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Author: makubacki

.sync/workflows/leaf/codeql-platform.yml

@@ -319,6 +319,14 @@ jobs:
       run: |
         subst Z: ${{ github.workspace }}
 
+    - name: Redirect Submodule URLs
+      shell: pwsh
+      run: |
+        git config --global url."https://github.com/TF-Hafnium/hafnium-prebuilts".insteadOf "https://git.trustedfirmware.org/hafnium/prebuilts"
+        git config --global url."https://github.com/TF-Hafnium/hafnium-project-reference".insteadOf "https://git.trustedfirmware.org/hafnium/project/reference"
+        git config --global url."https://github.com/TF-Hafnium/hafnium-third_party-dtc".insteadOf "https://git.trustedfirmware.org/hafnium/third_party/dtc"
+        git config --global url."https://github.com/TF-Hafnium/hafnium-third_party-googletest".insteadOf "https://git.trustedfirmware.org/hafnium/third_party/googletest"
+
     - name: Setup
       if: steps.get_platform_info.outputs.setup_supported == 'true'
       shell: pwsh