docs(tools/project-sync): update README

Author: Abogical

.github/workflows/README.md

@@ -139,3 +139,6 @@ Owner: CDK Support team
 
 [project-prioritization-added-on.yml](project-prioritization-added-on.yml): GitHub action that runs every day to update AddedOn field in the prioritization project board.
 Owner: CDK Support team
+
+### Issue sync
+[issue-sync.yml](issue-sync.yml): Github action that syncs issue metadat with the project board. More details can be found on the [project-sync](../../tools/@aws-cdk/project-sync) package.

tools/@aws-cdk/project-sync/README.md

@@ -60,7 +60,7 @@ yarn issue-sync-all
 1. The tool fetches issue details from GitHub using the GraphQL API
 2. For each issue, it:
    - Determines if the issue is part of the specified project
-   - Extracts issue metada including creation and update date
+   - Extracts issue metadata including creation and update date
    - Updates the corresponding custom fields in the GitHub Project with those dates.
 
 ## Development