update supported-libraryies.md

Author: chenlujjj

docs/supported-libraries.md

@@ -90,6 +90,7 @@ These are the supported libraries and frameworks:
 | [Jedis](https://github.com/xetorthio/jedis)                                                                                                 | 1.4+                               | N/A                                                                                                                                                                                                                                                                                                                                                                                     | [Database Client Spans]                                                                                                                 |
 | [JMS](https://javaee.github.io/javaee-spec/javadocs/javax/jms/package-summary.html)                                                         | 1.1+                               | N/A                                                                                                                                                                                                                                                                                                                                                                                     | [Messaging Spans]                                                                                                                       |
 | [Jodd Http](https://http.jodd.org/)                                                                                                         | 4.2+                               | N/A                                                                                                                                                                                                                                                                                                                                                                                     | [HTTP Client Spans], [HTTP Client Metrics]                                                                                              |
+| [JSON-RPC](https://github.com/briandilley/jsonrpc4j)                                                                                        | 1.6.0                              | N/A                                                                                                                                                                                                                                                                                                                                                                                     | [RPC Client Spans], [RPC Client Metrics], [RPC Server Spans], [RPC Server Metrics]                                                      |
 | [JSP](https://javaee.github.io/javaee-spec/javadocs/javax/servlet/jsp/package-summary.html)                                                 | 2.3.x only                         | N/A                                                                                                                                                                                                                                                                                                                                                                                     | Controller Spans [3]                                                                                                                    |
 | [Kotlin Coroutines](https://kotlinlang.org/docs/coroutines-overview.html)                                                                   | 1.0+                               | N/A                                                                                                                                                                                                                                                                                                                                                                                     | Context propagation                                                                                                                     |
 | [Ktor](https://github.com/ktorio/ktor)                                                                                                      | 1.0+                               | [opentelemetry-ktor-1.0](../instrumentation/ktor/ktor-1.0/library),<br>[opentelemetry-ktor-2.0](../instrumentation/ktor/ktor-2.0/library),<br>[opentelemetry-ktor-3.0](../instrumentation/ktor/ktor-3.0/library)                                                                                                                                                                        | [HTTP Client Spans], [HTTP Client Metrics], [HTTP Server Spans], [HTTP Server Metrics]                                                  |