Clarify which extension

#2268 (comment)

Author: sampart

extensions/ql-vscode/.markdownlint-cli2.cjs

@@ -1,7 +1,7 @@
 // Having the base options in a top-level config file means
-// that the extension can pick them up too, since that only
-// considers _this_ file when looking at files in this directory
-// or below.
+// that the VS Code markdownlint extension can pick them up
+// too, since that only considers _this_ file when looking
+// at files in this directory or below.
 base_options = require('../../.markdownlint.json')
 
 const options = require('@github/markdownlint-github').init(