Change version to master

Changed version to master.  The original version in the doc was throwing 401 errors.  Master seems to work.

Author: joegiglio

content/actions/managing-issues-and-pull-requests/adding-labels-to-issues.md

@@ -46,7 +46,7 @@ In the tutorial, you will first make a workflow file that uses the [`andymckay/l
           issues: write{% endif %}
         steps:
           - name: Label issues
-            uses: andymckay/labeler@5c59dabdfd4dd5bd9c6e6d255b01b9d764af4414
+            uses: andymckay/labeler@master
             with:
               add-labels: "triage"
               repo-token: {% raw %}${{ secrets.GITHUB_TOKEN }}{% endraw %}