[GitHub Actions Safari] Set the display color profile

It remains the case that many tests expect an sRGB color space, so set
the color profile appropriately.

.github/workflows/safari-wptrunner.yml

@@ -36,6 +36,9 @@ jobs:
         uses: actions/checkout@v4.1.0
         with:
           fetch-depth: 1
+      - name: Set display color profile
+        run: |-
+          ./wpt macos-color-profile
       - name: Enable safaridriver diagnostics
         if: inputs.safaridriver-diagnose
         run: |-