Fixed a typo in infra directory and deleted more clutter (#301)

Author: rspoerl1

docs/cybersecurity/Infrastrcture Team/_category_.json

@@ -1,5 +1,5 @@
 {
-  "label": "Infrastrcture Team",
+  "label": "Infrastructure Team",
   "position": 5,
   "link": {
     "type": "generated-index",