Fix broken code of conduct link (#3213)

Signed-off-by: Varun <[email protected]>

CONTRIBUTING.md

@@ -19,7 +19,7 @@ limitations under the License.
 # Contributing
 
 Welcome to Elyra! If you are interested in contributing to the [Elyra code repo](README.md)
-then checkout the [Contributor's Guide](https://github.com/elyra-ai/community/blob/main/contributing.md) and 
+then checkout the [Contributor's Guide](https://github.com/elyra-ai/community/blob/main/CONTRIBUTING.md) and 
 the [Code of Conduct](https://github.com/elyra-ai/community/blob/main/CODE_OF_CONDUCT.md). 
 
 The [Elyra community repo](https://github.com/elyra-ai/community) contains information on how the community
@@ -30,4 +30,4 @@ is organized and other information that is pertinent to contributing.
   <img src="https://contrib.rocks/image?repo=elyra-ai/elyra" />
 </a>
 
-Made with [contrib.rocks](https://contrib.rocks).
+Made with [contrib.rocks](https://contrib.rocks).