fix: update link checker to handle .html remapping

Author: bjohansebas

.github/workflows/check-pr-links.yml

@@ -37,5 +37,6 @@ jobs:
           args: |
             --root-dir $PWD/dist
             --remap 'https://expressjs\.com\/(.*)/ file://'$PWD'/dist/$1/index.html'
+            --remap 'https://expressjs\.com\/(.*)\.html file://'$PWD'/dist/$1/index.html'
             dist/
           fail: true