Bump dart-lang/setup-dart from 1.6.0 to 1.6.2

Closes #174

GitOrigin-RevId: da9f7e4
Change-Id: I0982bec87fa3f59cb80366adf4f75e1b290960d0
Reviewed-on: https://dart-review.googlesource.com/c/homebrew-dart/+/349712
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>

.github/workflows/test-package.yml

@@ -21,7 +21,7 @@ jobs:
         sdk: [dev, stable]
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
-      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
+      - uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
           sdk: ${{ matrix.sdk }}
       - id: install