Fix typo in DevOps beginner roadmap (#8331)

src/data/roadmaps/devops/devops-beginner.json

@@ -445,7 +445,7 @@
       },
       "selected": true,
       "data": {
-        "label": "DevOps is all about bringing developers and operations teams together to improve software delivery. They key focus areas are automation, infrastructure and monitoring.",
+        "label": "DevOps is all about bringing developers and operations teams together to improve software delivery. The key focus areas are automation, infrastructure and monitoring.",
         "style": {
           "fontSize": 17,
           "borderColor": "transparent",
@@ -2131,4 +2131,4 @@
       "focusable": true
     }
   ]
-}
+}