build(deps): bump dart-lang/setup-dart from 1.6.0 to 1.6.1

Bumps [dart-lang/setup-dart](https://github.com/dart-lang/setup-dart) from 1.6.0 to 1.6.1.
- [Release notes](https://github.com/dart-lang/setup-dart/releases)
- [Changelog](https://github.com/dart-lang/setup-dart/blob/main/CHANGELOG.md)
- [Commits](dart-lang/setup-dart@b64355a...ca7e6fe)

---
updated-dependencies:
- dependency-name: dart-lang/setup-dart
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/at_client_sdk.yaml

@@ -25,7 +25,7 @@ jobs:
       # Note: This workflow uses the latest stable version of the Dart SDK.
       # You can specify other versions if desired, see documentation here:
       # https://github.com/dart-lang/setup-dart/blob/main/README.md
-      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d # v1.6.0
+      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b # v1.6.1
         with:
           sdk: stable
       - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
@@ -112,7 +112,7 @@ jobs:
       # Note: This workflow uses the latest stable version of the Dart SDK.
       # You can specify other versions if desired, see documentation here:
       # https://github.com/dart-lang/setup-dart/blob/main/README.md
-      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d # v1.6.0
+      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b # v1.6.1
         with:
           sdk: stable
 
@@ -186,7 +186,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d # v1.6.0
+      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b # v1.6.1
         with:
           sdk: stable
 
@@ -237,7 +237,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d # v1.6.0
+      - uses: dart-lang/setup-dart@ca7e6fee45ffbd82b555a7ebfc236d2c86439f5b # v1.6.1
         with:
           sdk: stable