Update repository for validate_pr workflow

Author: labkey-tchad

.github/workflows/validate_pr.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Validate PR Branches
-        uses: labkey-tchad/gitHubActions/validate-pr@develop
+        uses: LabKey/gitHubActions/validate-pr@develop
         with:
           pr_base: ${{ github.event.pull_request.base.ref }}
           pr_head: ${{ github.event.pull_request.head.ref }}