Merge pull request docker-library#12792 from whesse/2.17.6

Update dart to 2.17.6

Author: tianon

library/dart

@@ -1,9 +1,9 @@
 Maintainers: Alexander Thomas <[email protected]> (@athomas), Tony Pujals <[email protected]> (@subfuzion)
 GitRepo: https://github.com/dart-lang/dart-docker.git
 GitFetch: refs/heads/main
-GitCommit: 9ed837469954305139fd39f5b05f4d34138f1659
+GitCommit: 2aab12c49323e537d89883cb1b2b649ba7cbc83f
 
-Tags: 2.17.5-sdk, 2.17-sdk, 2-sdk, stable-sdk, sdk, 2.17.5, 2.17, 2, stable, latest
+Tags: 2.17.6-sdk, 2.17-sdk, 2-sdk, stable-sdk, sdk, 2.17.6, 2.17, 2, stable, latest
 Architectures: amd64, arm32v7, arm64v8
 Directory: stable/bullseye