[ve] Add missing export-har-menu context value.

Bug: 357571602, 378076279, 361717594
Change-Id: I17a82e1d9d7ca3bec280eeae8907ca353dbc823b
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6062783
Auto-Submit: Benedikt Meurer <[email protected]>
Commit-Queue: Benedikt Meurer <[email protected]>
Reviewed-by: Danil Somsikov <[email protected]>
Commit-Queue: Danil Somsikov <[email protected]>

Author: bmeurer

front_end/ui/visual_logging/KnownContextValues.ts

@@ -1280,6 +1280,7 @@ export const knownContextValues = new Set([
   'explain.console-message.hover',
   'explanation',
   'export-har',
+  'export-har-menu',
   'export-har-with-sensitive-data',
   'export-recording',
   'expose-internals',