ci: install window manager readiness dependency in Linux diagnostic

.github/workflows/e2e.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-15]
+        os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 25
     steps:
@@ -17,7 +17,7 @@ jobs:
           persist-credentials: false
       - name: Install Linux tools
         if: runner.os == 'Linux'
-        run: sudo apt-get update && sudo apt-get install -y build-essential python3 xvfb openbox x11-utils
+        run: sudo apt-get update && sudo apt-get install -y build-essential python3 xvfb openbox x11-utils ripgrep
       - uses: ./.github/actions/install-node-dependencies
         with:
           native-runtime: electron