Bump the github-actions group with 2 updates

Closes #194

GitOrigin-RevId: 350ec69
Change-Id: I19d330ad5b0f9b7b9c7208375036c62f14317da1
Reviewed-on: https://dart-review.googlesource.com/c/homebrew-dart/+/373960
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: Kevin Moore <kevmoo@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>

.github/workflows/test-package.yml

@@ -20,8 +20,8 @@ jobs:
       matrix:
         sdk: [dev, stable]
     steps:
-      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
-      - uses: dart-lang/setup-dart@f0ead981b4d9a35b37f30d36160575d60931ec30
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
+      - uses: dart-lang/setup-dart@0a8a0fc875eb934c15d08629302413c671d3f672
         with:
           sdk: ${{ matrix.sdk }}
       - id: install