meta: bump pnpm/action-setup from 5.0.0 to 6.0.3

Bumps [pnpm/action-setup](https://github.com/pnpm/action-setup) from 5.0.0 to 6.0.3.
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@fc06bc1...903f9c1)

---
updated-dependencies:
- dependency-name: pnpm/action-setup
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pnpm-updater.yml

@@ -39,7 +39,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@903f9c1a6ebcba6cf41d87230be49611ac97822e # v6.0.3
 
       - name: Update pnpm and package.json
         id: update-pnpm

.github/workflows/tmp-cloudflare-open-next-deploy.yml

@@ -40,7 +40,7 @@ jobs:
           persist-credentials: false
 
       - name: Set up pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@903f9c1a6ebcba6cf41d87230be49611ac97822e # v6.0.3
 
       - name: Set up Node.js
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0