ci: fix release workflow to get valgrind headers during pnpm install

Author: GuillaumeLagrange

.github/workflows/release.yml

@@ -23,12 +23,11 @@ jobs:
           cache: pnpm
           node-version-file: .nvmrc
           registry-url: "https://registry.npmjs.org"
-      - run: pnpm install --frozen-lockfile --prefer-offline
       - name: Install valgrind
         run: |
           sudo apt-get update
           sudo apt-get install -y valgrind
-
+      - run: pnpm install --frozen-lockfile --prefer-offline
       - name: Build the libraries
         run: pnpm moon run :build