fix(block-kit): match the context actions block example to the docs (#359)

Co-authored-by: Claude <svc-devxp-claude@slack-corp.com>
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: 3 people

block-kit/src/blocks/context_actions.py

@@ -11,7 +11,7 @@
 
 def example01() -> ContextActionsBlock:
     """
-    Holds interactive elements like feedback buttons and icon buttons.
+    Displays actions as contextual info, which can include both feedback buttons and icon buttons.
     https://docs.slack.dev/reference/block-kit/blocks/context-actions-block/
 
     Context actions block with feedback buttons.