updated links

README.md

@@ -10,7 +10,7 @@ References and Resources:
 * [Java Archive (.jar)](https://docs.oracle.com/javase/tutorial/deployment/jar/basicsindex.html) for sharable/runnable software libraries
 * [Java SE JDK download](http://www.oracle.com/technetwork/java/javase/downloads/index.html) (JDK 8 or 12)
 * [Netbeans](http://www.netbeans.org) (version 8.2 or 11), [Using Git Support in NetBeans IDE](https://netbeans.org/kb/docs/ide/git.html) 
-and [Video of Cloning a Git Repository Using NetBeans IDE](https://netbeans.org/kb/docs/ide/git_nb_ssh_screencast.html), or
+and [Video of Cloning a Git Repository Using NetBeans IDE](https://netbeans.org/kb/docs/ide/git_nb_ssh_screencast.html)
 * [Open-DIS Repository](https://github.com/open-dis) and [Distributed Interactive Simulation: The Missing Handbook](https://github.com/open-dis/DISTutorial/blob/master/README.md)
 * [Savage Developers Guide](https://savage.nps.edu/Savage/developers.html) resources for [Cygwin](https://savage.nps.edu/Savage/developers.html#Cygwin), [DIS](https://savage.nps.edu/Savage/developers.html#DIS) and [telnet](https://savage.nps.edu/Savage/developers.html#telnet)
 * [Sequence Diagram](https://en.wikipedia.org/wiki/Sequence_diagram) and [Timing Diagram (UML)](https://en.wikipedia.org/wiki/Timing_diagram_(Unified_Modeling_Language)) on Wikipedia