chore: Increase max. commit subject length to 90

Filenames seem to be included in subject length, resulting in rather
long messages, so I'm increasing the limit to spend less time trying to
keep the first commit message line short.

committed.toml

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: MIT
 
-subject_length = 80
+subject_length = 90
 line_length = 100
 style = "conventional"
 merge_commit = false