Include gl-coverage-fuzzing-report.json in artifacts

ee/changelogs/unreleased/coverage-fuzzing-include-json-in-artifact.yml

+---
+title: add gl-coverage-fuzzing-report.json to artifacts
+merge_request: 37110
+author:
+type: changed

lib/gitlab/ci/templates/Security/Coverage-Fuzzing.gitlab-ci.yml

@@ -23,6 +23,7 @@ variables:
     paths:
       - corpus
       - crashes
+      - gl-coverage-fuzzing-report.json
     reports:
       coverage_fuzzing: gl-coverage-fuzzing-report.json
     when: always