build: fix path

.github/workflows/mac-build.yml

@@ -34,11 +34,14 @@ jobs:
         # Ensure depot_tools does not update.
         test -d depot_tools && cd depot_tools
         touch .disable_auto_update
-    - run: echo 'export PATH="$PATH:'"$PWD"'/depot_tools"' >> $GITHUB_PATH
+    - run: echo "$PWD/depot_tools" >> $GITHUB_PATH
+    # - run: echo 'export PATH="$PATH:'"$PWD"'/depot_tools"' >> $GITHUB_ENV
+    - run: echo "$PATH"
     # step-gclient-sync, L287
     - name: Gclient Sync
       run: |
         # If we did not restore a complete sync then we need to sync for realz
+        echo "$PATH second"
         if [ ! -s "src/electron/.circle-sync-done" ]; then
           gclient config \
             --name "src/electron" \