chore(deps): update pnpm to v9 (#8123)

* chore(deps): update pnpm to v9

* update workflow

---------

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

.github/actions/install-frontend-deps/action.yml

@@ -24,7 +24,7 @@ runs:
     - name: Install pnpm
       uses: pnpm/action-setup@v2
       with:
-        version: 8.15
+        version: 9
     - uses: actions/setup-node@v4
       with:
         node-version: 18

package.json

@@ -107,6 +107,6 @@
 	},
 	"engines": {
 		"node": ">=18.0.0",
-		"pnpm": "~8.15.0"
+		"pnpm": "~9.0.0"
 	}
 }