Fix syntax error in ci.yml

.github/workflows/ci.yml

@@ -7,13 +7,13 @@ jobs:
     name: Build binary CI
     runs-on: ubuntu-latest
     strategy:
-    matrix:
-      # build and publish in parallel: linux/386, linux/amd64, windows/386, windows/amd64, darwin/386, darwin/amd64 
-      goos: [linux, windows, darwin]
-      goarch: ["386", amd64, arm]
-      exclude: 
-        - goos: darwin
-          goarch: arm
+      matrix:
+        # build and publish in parallel: linux/386, linux/amd64, windows/386, windows/amd64, darwin/386, darwin/amd64 
+        goos: [linux, windows, darwin]
+        goarch: ["386", amd64, arm]
+        exclude: 
+          - goos: darwin
+            goarch: arm
 
     steps:
     - uses: actions/checkout@v2