Fix JDK 11 bug on Windows during JavaDoc creation.

See:
- https://issues.apache.org/jira/browse/MJAVADOC-586
- openzipkin/zipkin#2893

.github/workflows/ci.yml

@@ -13,7 +13,12 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
-        jdk: [11, 17]
+        jdk: 17
+        include:
+          - os: ubuntu-latest
+            jdk: 11
+          - os: macos-latest
+            jdk: 11
 
     runs-on: ${{ matrix.platform }}
     name: on ${{ matrix.platform }} with JDK ${{ matrix.jdk }}