Update java and macos for the test matrix

Author: zeroSteiner

.github/workflows/shared_meterpreter_acceptance.yml

@@ -67,7 +67,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - macos-14
+          - macos-15
           - windows-2022
           - ubuntu-latest
         ruby:
@@ -78,7 +78,6 @@ jobs:
           - { name: python, runtime_version: 3.11 }
 
           # Java
-          - { name: java, runtime_version: 8 }
           - { name: java, runtime_version: 21 }
 
           # PHP
@@ -91,6 +90,9 @@ jobs:
           # TODO: Screenshotting behavior fails:
           # - { meterpreter: { name: windows_meterpreter }, ruby: '3.4', os: windows-2025 }
 
+          # Java
+          - { meterpreter: { name: java, runtime_version: 8 }, os: macos-13 }
+
           # Mettle
           - { meterpreter: { name: mettle }, os: macos-13 }
           - { meterpreter: { name: mettle }, os: ubuntu-latest }