Adding context string

Author: cynthn

docfx.json

@@ -1157,10 +1157,10 @@
         "articles/time-series-insights/**/*.yml": ["Azure","Time Series Insights"],
         "articles/virtual-machines/**/*.md": ["Azure","Virtual Machines"],
         "articles/virtual-machines/**/*.yml": ["Azure","Virtual Machines"],
-        "articles/virtual-machines/linux/**/*.md": ["Azure","Linux Virtual Machines"],
-        "articles/virtual-machines/linux/**/*.yml": ["Azure","Linux Virtual Machines"],
-        "articles/virtual-machines/windows/**/*.md": ["Azure","Windows Virtual Machines"],
-        "articles/virtual-machines/windows/**/*.yml": ["Azure","Windows Virtual Machines"],
+        "articles/virtual-machines/linux/**/*.md": ["Azure","Virtual Machines"],
+        "articles/virtual-machines/linux/**/*.yml": ["Azure","Virtual Machines"],
+        "articles/virtual-machines/windows/**/*.md": ["Azure","Virtual Machines"],
+        "articles/virtual-machines/windows/**/*.yml": ["Azure","Virtual Machines"],
         "articles/virtual-machine-scale-sets/**/*.md": ["Azure","Virtual Machine Scale Sets"],
         "articles/virtual-machine-scale-sets/**/*.yml": ["Azure","Virtual Machine Scale Sets"]
       },