chore: pin npm to 8

Author: keithamus

.github/workflows/pr.yml

@@ -28,7 +28,7 @@ jobs:
 
       # https://github.com/bahmutov/npm-install/issues/103#issuecomment-931226602
       - name: Update NPM
-        run: npm install --global npm
+        run: npm install --global npm@8
 
       - name: Install Dependencies
         run: npm ci