Change submodule synchronize action to user with CLA

Otherwise when merging between branches, googlebot complains that the user hasn't signed the CLA.

Part of https://github.com/google/iree/issues/2279

Closes https://github.com/google/iree/pull/2308

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/2308 from GMNGeoffrey:fix-action-author 2acf1dc0f0e64b2899b8c2702ff2dbd2b3c4c3ef
PiperOrigin-RevId: 318143864
diff --git a/.github/workflows/synchronize_submodules.yml b/.github/workflows/synchronize_submodules.yml
index a27e7ed..f56af6b 100644
--- a/.github/workflows/synchronize_submodules.yml
+++ b/.github/workflows/synchronize_submodules.yml
@@ -41,7 +41,7 @@
       - name: Committing updates
         if: env.has_diff == 'true'
         run: |
-          git config --local user.email "noreply+action@github.com"
+          git config --local user.email "iree-github-actions-bot@google.com"
           git config --local user.name "Submodule Synchronize Action"
           git commit -am "Synchronize submodules"
       - name: Pushing changes