Info on changed CLI switch debug

[Siedlerchr]

For tinylog. Refs https://github.com/JabRef/jabref/pull/8226

Debug log level is only possible with java property -Dtinylog.level=debug

DevDocs need to be adjusted as well.

[koppor]

JabRef-5.10-portable_windows(1)\JabRef\runtime\bin\JabRef.bat

- pushd %DIR% & %JAVA_EXEC% %CDS_JVM_OPTS%  -p "%~dp0/../app" -m org.jabref/org.jabref.cli.Launcher  %* & popd
+ ??? (we don't know)
+