tests: maintainers: increase the file count to 75

Drivers are getting larger and larger, increase the warning
threshold to 75.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

tests/series/maintainers/test.py

@@ -97,7 +97,7 @@ def check_maintainer_coverage(tree, new_files, out):
 
     # Ideal entry size is <50. But if someone is adding a Kconfig file,
     # chances are they should be a maintainer.
-    pass_target = 50
+    pass_target = 75
     if 'Kconfig' in new_files:
         pass_target = 3