chore: Track flagsmith-js-sdk 12.3.0 (#8417)

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: wadii <wadii.zaim@flagsmith.com>

Author: 4 people

api/app_analytics/constants.py

@@ -56,6 +56,7 @@
         "12.1.0",
         "12.1.2",
         "12.2.0",
+        "12.3.0",
     ],
     "flagsmith-kotlin-android-sdk": [
         "unknown",