ci: install pnpm explicitly before frontend steps

Author: gildesmarais

.github/workflows/ci.yml

@@ -54,15 +54,15 @@ jobs:
         with:
           bundler-cache: true
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.33.0
+
       - name: Setup Node.js for OpenAPI lint tooling
         uses: actions/setup-node@v6
         with:
           node-version-file: ".tool-versions"
-          cache: pnpm
-          cache-dependency-path: frontend/pnpm-lock.yaml
-
-      - name: Enable Corepack
-        run: corepack enable
 
       - name: Install frontend dependencies for OpenAPI client verification
         run: pnpm install --frozen-lockfile
@@ -82,15 +82,15 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.33.0
+
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
           node-version-file: ".tool-versions"
-          cache: pnpm
-          cache-dependency-path: frontend/pnpm-lock.yaml
-
-      - name: Enable Corepack
-        run: corepack enable
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
@@ -184,15 +184,15 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v6
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.33.0
+
       - name: Setup Node.js for Docker build
         uses: actions/setup-node@v6
         with:
           node-version-file: ".tool-versions"
-          cache: pnpm
-          cache-dependency-path: frontend/pnpm-lock.yaml
-
-      - name: Enable Corepack
-        run: corepack enable
 
       - name: Install frontend dependencies
         run: pnpm install --frozen-lockfile