CLDR-15176 ansible-lint: workaround for ansible-lint and vagant issues

- ansible-lint issue ansible/ansible-lint#1795
- vagrant pin macos version per actions/runner-images#4060

.github/workflows/ansible-lint.yml

@@ -14,6 +14,8 @@ jobs:
       uses: ansible/ansible-lint-action@c37fb7b4bda2c8cb18f4942716bae9f11b0dc9bc
       with:
         targets: tools/scripts/ansible/*-playbook.yml
+        override-deps: |
+          rich>=9.5.1,<11.0.0
     - name: Cache lint npm repository
       uses: actions/cache@v2
       with:
@@ -34,7 +36,7 @@ jobs:
       timeout-minutes: 10
       run: (cd tools/cldr-apps/js && npm t)
   build:
-    runs-on: macos-latest
+    runs-on: macos-10.15  # see https://github.com/actions/virtual-environments/issues/4060
     steps:
     - uses: actions/checkout@v2
       with: