chore: Track flagsmith-flutter-sdk 6.1.1 (#7533)

Co-authored-by: flagsmith-engineering[bot] <flagsmith-engineering[bot]@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Kim Gustyr <kim.gustyr@flagsmith.com>

Author: 4 people

api/app_analytics/constants.py

@@ -31,6 +31,7 @@
     "flagsmith-flutter-sdk": [
         "unknown",
         "6.1.0",
+        "6.1.1",
     ],
     "flagsmith-go-sdk": [
         "unknown",