Bump dart-lang/setup-dart from 1.6.1 to 1.6.2 (#5498)

Author: dependabot[bot]

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
         with:
           submodules: recursive
-      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b
+      - uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
           sdk: ${{ matrix.sdk }}
       - name: Fetch packages
@@ -64,7 +64,7 @@ jobs:
         with:
           submodules: recursive
       - run: make build
-      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b
+      - uses: dart-lang/setup-dart@fedb1266e91cf51be2fdb382869461a434b920a3
         with:
           sdk: stable
       - name: Fetch packages