build(ci): 更新 GitHub Actions 构建配置

- 为 Windows平台构建产物命名为 go-stock-windows-amd64.exe
-为 Linux 平台构建产物命名为 go-stock-linux-amd64- 通过明确指定构建输出名称，提高构建结果的可识别性和一致性

.github/workflows/main.yml

@@ -17,10 +17,10 @@ jobs:
       fail-fast: false
       matrix:
         build:
-          - name: 'go-stock-${{ matrix.build.platform }}.exe'
+          - name: 'go-stock-windows-amd64.exe'
             platform:  'windows/amd64'
             os: 'windows-latest'
-          - name: 'go-stock-${{ matrix.build.platform }}'
+          - name: 'go-stock-linux-amd64'
             platform: 'linux/amd64'
             os: 'ubuntu-latest'