Added known context value "language-mismatch"

Bug: 357571602
Change-Id: I154addc8d06d76eded9b2cd2e6bd444b8dafb114
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6304923
Reviewed-by: Benedikt Meurer <[email protected]>
Commit-Queue: Danil Somsikov <[email protected]>

Author: danilsomsikov

front_end/ui/visual_logging/KnownContextValues.ts

@@ -1890,6 +1890,7 @@ export const knownContextValues = new Set([
   'language-lo',
   'language-lt',
   'language-lv',
+  'language-mismatch',
   'language-mk',
   'language-ml',
   'language-mn',