Add Javacord do security.md

Author: Andre601

SECURITY.md

@@ -18,6 +18,18 @@ Those are also the only versions that may receive bug fixes and patches.
 | 2.x     | :x:                |        |
 | 1.x     | :x:                |        |
 
+----
+### Javacord-Module
+
+| Version | Supported          | Notes: |
+| ------- | ------------------ | ------ |
+| 6.x     | :white_check_mark: |        |
+| 5.x     | :x:                |        |
+| 4.x     | :x:                |        |
+| 3.x     | :x:                |        |
+| 2.x     | :x:                |        |
+| 1.x     | :x:                |        |
+
 ----
 ### JDA-Module