Merge pull request #203 from jkeen/pnpm-version

Correct another pnpm version mismatch I missed

Author: knownasilya

.github/workflows/plan-release.yml

@@ -57,7 +57,7 @@ jobs:
           node-version: 18
       - uses: pnpm/action-setup@v4
         with:
-          version: 9
+          version: 9.12.3
       - run: pnpm install --frozen-lockfile
       - name: "Generate Explanation and Prep Changelogs"
         id: explanation