fix: use single quotes

Author: menzerath

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           go-version: 1.17
       - name: decide build file suffix
-        if: ${{ matrix.goos == "windows" }}
+        if: ${{ matrix.goos == 'windows' }}
         run: echo "suffix=.exe" >> $GITHUB_ENV
       - name: build project
         env: