lacros: Fix capitalization of flag description

We've settled on "Lacros" instead of "LaCrOS".

Bug: none
Change-Id: Ie70ad8e81c1340466ad40f130495177aa0db9b50
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462297
Commit-Queue: James Cook <jamescook@chromium.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815449}

chrome/browser/flag_descriptions.cc

@@ -4239,7 +4239,7 @@ const char kInteractiveWindowCycleListDescription[] =
     "Adds mouse behavior, three-finger touchpad swipe, left/right "
     "arrow navigation, and space/enter confirmation to Alt-Tab.";
 
-const char kLacrosSupportName[] = "LaCrOS support";
+const char kLacrosSupportName[] = "Lacros support";
 const char kLacrosSupportDescription[] =
     "Support for the experimental lacros-chrome browser.";