Upgrade cache and checkout actions versions

Author: seadeep42

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-node@v4
         with:
@@ -20,7 +20,7 @@ jobs:
         id: yarn-cache-dir-path
         run: echo "::set-output name=dir::$(yarn cache dir)"
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}