feat(ci): enable pnpm caching in CI (#2530)

Author: SauravMaheshkar

.github/workflows/main.yml

@@ -27,6 +27,7 @@ jobs:
               with:
                   node-version: ${{ matrix.node-version }}
                   check-latest: false
+                  cache: 'pnpm'
             - run: npm i -g pnpm
             - run: pnpm install
             - run: ./node_modules/.bin/cypress install