[win-bootstrap] Update warning to specify agreement is to automatic updates

Bug: b/382395049
Change-Id: I6e9aa9521f1f101590b292eb1f8d381cf3c88de8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6072988
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Anne Redulla <aredulla@google.com>
Reviewed-by: Allen Li <ayatane@chromium.org>

bootstrap/bootstrap.py

@@ -414,15 +414,18 @@ def _win_git_bootstrap_config():
         return
 
     if allow_global not in ('true', '1', 'yes', 'on'):
-        logging.warning(
-            'depot_tools would like to update your global Git config\n'
-            'to have the optimal settings for Chromium development.\n'
-            'Allow this by running:\n'
-            f'    git config --global {allow_global_key} true\n'
-            'Then, get depot_tools to update your config by running:\n'
-            '    gclient sync\n'
-            'To deny and silence this warning, run:\n'
-            f'    git config --global {allow_global_key} false\n')
+        lines = [
+            'depot_tools would like to update your global Git config',
+            'to have the optimal settings for Chromium development.',
+            'You can allow depot_tools to automatically update your global',
+            'Git config to recommended settings by running:',
+            f'$ git config --global {allow_global_key} true',
+            '',
+            'To suppress this warning:',
+            f'$ git config --global {allow_global_key} false',
+        ]
+
+        logging.warning('\n'.join(lines))
         return
 
     # Global git config changes have been authorized - do the update.