chore(deps): update pnpm/action-setup action to v6 (#481)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/migrate-db.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
         name: Install pnpm
         with:
           run_install: false

.github/workflows/nextjs.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
         name: Install pnpm
         with:
           run_install: false