chore(pr checks): add missing token to the... (#516)

Author: nickboldt

.github/workflows/pr.yml

@@ -93,6 +93,8 @@ jobs:
 
       - name: PR comment with doc preview, replacing existing comments with a new one each time
         shell: bash
+        env:
+          GH_TOKEN: ${{ secrets.RHDH_BOT_TOKEN }}
         run: |
           PR_NUM="${{ github.event.number }}"
           # for a given PR, check for existing comments from rhdh-bot; select the last one (if more than one)