Improve CI job naming

Author: cowtowncoder

.github/workflows/main.yml

@@ -14,6 +14,7 @@ permissions:
 
 jobs:
   build:
+    name: "build (JDK ${{ matrix.java_version }}, Guava ${{ matrix.guava_version }})"
     runs-on: 'ubuntu-24.04'
     strategy:
       fail-fast: false