Update build.yml

Author: kitUIN

.github/workflows/build.yml

@@ -49,7 +49,12 @@ jobs:
         run: msbuild $env:Solution_Name/$env:Solution_Name.csproj /t:Restore /p:Configuration=$env:Configuration
         env:
           Configuration: ${{ matrix.configuration }}
-
+      - uses: actions/cache@v4
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-nuget-
       - name: Decode the pfx
         run: |
           $pfx_cert_byte = [System.Convert]::FromBase64String("${{ secrets.BASE64_ENCODED_PFX }}")