swap ownership for App Insights docs

Author: mrbullwinkle

docfx.json

@@ -150,7 +150,7 @@
         "articles/devtest-labs/**/*.md": "juliako",
         "articles/lab-services/**/*.md": "juliako",
         "articles/azure-monitor/insights/container-insights*.md": "bwren",
-        "articles/azure-monitor/app/*.md": "mrbullwinkle",
+        "articles/azure-monitor/app/*.md": "lgayhardt",
         "articles/azure-monitor/log-query/*.md": "rboucher",
         "articles/azure-monitor/platform/*.md": "rboucher",
         "articles/app-service/*.md": "cephalin",