Add headless mode to job name

Author: urfeex

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     timeout-minutes: 30
     runs-on: ubuntu-latest
-    name: build (${{matrix.env.URSIM_VERSION}}-${{matrix.env.ROBOT_MODEL}})
+    name: build (${{matrix.env.URSIM_VERSION}}-${{matrix.env.ROBOT_MODEL}}-${{matrix.HEADLESS}})
     strategy:
       fail-fast: false
       matrix: