excluding https://github.com/rcs/rcs-viewer/pull/81 from link checker

Author: spier

.github/workflows/main.yml

@@ -13,6 +13,6 @@ jobs:
       id: lc
       uses: peter-evans/link-checker@v1
       with:
-        args: -v -d . -x "http://creativecommons.org/licenses|https://isc-inviter.herokuapp.com" README.md patterns/ -r
+        args: -v -d . -x "http://creativecommons.org/licenses|https://isc-inviter.herokuapp.com|https://github.com/rcs/rcs-viewer/pull/81" README.md patterns/ -r
     - name: Fail if there were link errors
       run: exit ${{ steps.lc.outputs.exit_code }}