Use pinned version of mac image

.yamato/sonar.yml

@@ -1,7 +1,7 @@
 name: Sonarqube Scan
 agent:
     type: Unity::metal::macmini
-    image: package-ci/mac
+    image: package-ci/mac:v1.8.1-822785
     flavor: m1.mac
 variables:
     PROJECT_PATH: TestUrdfImporter
@@ -30,4 +30,4 @@ triggers:
         ((pull_request.target eq "main" OR pull_request.target eq "dev")
         AND NOT pull_request.push.changes.all match "**/*.md") OR
         (push.branch eq "main" OR push.branch eq "dev")
-        
+