add cache

.forgejo/workflows/build.yaml

@@ -14,6 +14,18 @@ jobs:
       - uses: actions/checkout@v4
       - name: install pnpm
         run: npm install -g pnpm
+      - name: Restore pnpm cache
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/.pnpm-store
+          key: ${{ runner.os }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
+      - name: pnpm install
+        run: pnpm install
+      - name: Restore pnpm cache
+        uses: actions/cache/save@v3
+        with:
+          path: ~/.pnpm-store
+          key: ${{ runner.os }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
       - name: dotnet restore
         run: dotnet restore
       - name: dotnet build