Update some stephengold libraries and make mavenCentral the first place

[tonihele]

At least I get a build error if I don't switch the mavenCentral as first repo. com.github.stephengold:j-ogg-all is nowadays hosted in Maven central. And removed from other sources. There is simply a message to use Maven central. This fixes it for me.

Full Version: 3.5-2321 |  
-- | --


<span class="ConsoleLogItem__text ConsoleLogItem__text--gradle_failure">BUILD FAILED</span><span class="ConsoleLogItem__text ConsoleLogItem__text--normal"> in 6s</span><!--EndFragment-->
</body>
</html>Full Version: 3.5-2321	
POM Version: 3.5.2-SNAPSHOT	
NBM Revision: 2321	
NBM UC Suffix: nightly/3.5/plugins	
	
FAILURE: Build failed with an exception.	
	
* Where:	
Build file 'C:\Users\Toni\Documents\ToniArts\sdk\build.gradle' line: 133	
	
* What went wrong:	
A problem occurred evaluating root project 'sdk'.	
> Could not resolve all files for configuration ':corelibs'.	
   > Could not find j-ogg-all-1.0.1.jar (com.github.stephengold:j-ogg-all:1.0.1).	
     Searched in the following locations:	
         https://jitpack.io/com/github/stephengold/j-ogg-all/1.0.1/j-ogg-all-1.0.1.jar	
	
* Try:	
> Run with --stacktrace option to get the stack trace.	
> Run with --info or --debug option to get more log output.	
	
* Get more help at https://help.gradle.org/	
	
BUILD FAILED in 6s

[tonihele]

I'll integrate this in 24h if no opposition arises