Rename script name to run on action

This change renames the script name that's run on the GitHub action to be equal to the name used on the instruction above ("Add a script to your package.json to generate the types").

web/spec/supabase.yml

@@ -253,7 +253,7 @@ pages:
             - uses: actions/setup-node@v2.1.5
               with:
                 node-version: 14
-            - run: npm run update-database-types
+            - run: npm run update-types
             - name: check for file changes
               id: git_status
               run: |