Update maven.yml

Author: pitbulk

.github/workflows/maven.yml

@@ -8,11 +8,11 @@ on: [push, pull_request]
 jobs:
   test:
 
-    runs-on: runs-on: ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
       strategy:
-      matrix:
-        java: [ '7', '8', '9', '10', '11' ]
-        os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
+        matrix:
+          java: [ '7', '8', '9', '10', '11' ]
+          os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
     name: Java ${{ matrix.Java }} (${{ matrix.os }})
     steps:
     - uses: actions/checkout@v2