update log format to match the latest iteration.

It was changed in gitbutlerapp/gitbutler#4255.

Note that the log without date, `GitButler.log`, could not be observed
and was removed for that reason.

Author: Byron

docs/development/debugging.md

@@ -19,16 +19,15 @@ In this directory, there should be rolling daily logs:
 
 ❯ tree -L 1
 .
-├── GitButler.log
-├── GitButler.log.2023-09-02
-├── GitButler.log.2023-09-03
-├── GitButler.log.2023-09-04
-├── GitButler.log.2023-09-05
-├── GitButler.log.2023-09-06
-├── GitButler.log.2023-09-07
-├── GitButler.log.2023-09-08
-├── GitButler.log.2023-10-10
-├── GitButler.log.2024-01-30
+├── GitButler.2023-09-02.log
+├── GitButler.2023-09-03.log
+├── GitButler.2023-09-04.log
+├── GitButler.2023-09-05.log
+├── GitButler.2023-09-06.log
+├── GitButler.2023-09-07.log
+├── GitButler.2023-09-08.log
+├── GitButler.2023-10-10.log
+├── GitButler.2024-01-30.log
 └── tokio-console
 
 ❯ tail GitButler.log.2024-01-30