chore: update circle ci yaml

Author: Angelii

.circleci/config.yml

@@ -14,6 +14,12 @@ jobs:
       - run:
           name: install dependencies
           command: pnpm install --ignore-scripts
+       # pnpm version
+      - run:
+         name: Install pnpm package manager
+         command: |
+          corepack enable
+          corepack prepare pnpm@8.8 --activate
       # save any changes to the cache
       - save_cache:
           key: npm-dependencies-{{ checksum "pnpm-lock.yaml" }}
@@ -28,4 +34,8 @@ workflows:
 
   ci:
     jobs:
-      - main
+      - main:
+          filters:
+            branches:
+              only:
+                - main