ci: enable pnpm via corepack before install

.gitea/workflows/ci.yaml

@@ -35,6 +35,9 @@ jobs:
       - name: Deploy port-selection tests
         run: bash scripts/ci-deploy-ports.test.sh
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
@@ -65,6 +68,9 @@ jobs:
         with:
           node-version-file: .nvmrc
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
@@ -98,6 +104,9 @@ jobs:
         with:
           node-version-file: .nvmrc
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
@@ -119,6 +128,9 @@ jobs:
         with:
           node-version-file: .nvmrc
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
@@ -161,6 +173,9 @@ jobs:
         with:
           node-version-file: .nvmrc
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
@@ -195,6 +210,9 @@ jobs:
         with:
           node-version-file: .nvmrc
 
+      - name: Enable pnpm
+        run: corepack enable
+
       - name: Install dependencies
         run: pnpm install --frozen-lockfile