git: tweak fsmonitor warning message to mention the git version fix

R=avi@chromium.org, sokcevic@chromium.org

Bug: 1475405
Change-Id: Iaa29a2993871837352eb9d02d368102a212edf49
Follow-up-of: https://crrev.com/c/4892305
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4911838
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Auto-Submit: Thiago Perrotta <tperrotta@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>

git_common.py

@@ -433,10 +433,10 @@ def warn_submodule():
         print(colorama.Fore.RED)
         print('WARNING: You have fsmonitor enabled. There is a major issue '
               'resulting in git diff-index returning wrong results. Please '
-              'disable it by running:')
+              'either disable it by running:')
         print('    git config core.fsmonitor false')
-        print('We will remove this warning once https://crbug.com/1475405 is '
-              'fixed.')
+        print('or upgrade git to version >= 2.43.')
+        print('See https://crbug.com/1475405 for details.')
         print(colorama.Style.RESET_ALL)