Bump docfxtocgenerator from 1.38.0 to 1.40.0

---
updated-dependencies:
- dependency-name: docfxtocgenerator
  dependency-version: 1.40.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.config/dotnet-tools.json

@@ -38,7 +38,7 @@
       "rollForward": false
     },
     "docfxtocgenerator": {
-      "version": "1.38.0",
+      "version": "1.40.0",
       "commands": [
         "DocFxTocGenerator"
       ],
@@ -52,12 +52,4 @@
       "rollForward": false
     }
   }
-}
-
-
-
-
-
-
-
-
+}