chore: pin pnpm version

Author: art049

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - run: sudo apt-get install -y valgrind
       - uses: pnpm/[email protected]
         with:
-          version: latest
+          version: 7
       - uses: "actions/setup-node@v3"
         with:
           cache: "pnpm"
@@ -31,7 +31,7 @@ jobs:
       - run: sudo apt-get install -y valgrind
       - uses: pnpm/[email protected]
         with:
-          version: latest
+          version: 7
       - uses: "actions/setup-node@v3"
         with:
           cache: "pnpm"