Update own-main.md

updated Clara docs with link to new docs inside the catch documentation itself. Fixing issue #2312

docs/own-main.md

@@ -110,7 +110,7 @@ int main( int argc, char* argv[] ) {
 }
 ```
 
-See the [Clara documentation](https://github.com/catchorg/Clara/blob/master/README.md)
+See the [Clara documentation](https://github.com/irvincardoza/Catch2/blob/devel/docs/Clara.md)
 for more details on how to use the Clara parser.