Fix stage names

.github/workflows/main.yml

@@ -1,7 +1,7 @@
 on: [push, pull_request]
 name: Test
 jobs:
-  Windows x64:
+  Windows_x64:
     runs-on: windows-latest
     steps:
     - name: Install Go
@@ -15,7 +15,7 @@ jobs:
         7z e ultralight.7z .\bin\*.dll
     - name: Test
       run: go test
-  Windows x32:
+  Windows_x32:
     runs-on: windows-latest
     steps:
     - name: Install Go
@@ -32,7 +32,7 @@ jobs:
         GOARCH: 386
         CGO_ENABLED: 1
       run: go test
-  Linux x64:
+  Linux_x64:
     runs-on: ubuntu-latest
     steps:
     - name: Install Go
@@ -45,7 +45,7 @@ jobs:
         7z e ultralight.7z .\bin\*.dll
     - name: Test
       run: go test
-  Mac x64:
+  Mac_x64:
     runs-on: macOS-latest
     steps:
     - name: Install Go