Convert link to ReST format

Author: dgarros

docs/source/examples/index.rst

@@ -2,7 +2,7 @@
 Examples
 ############
 
-For each example, the complete source code is [available in Github](https://github.com/networktocode/diffsync/tree/main/examples) in the `examples` directory
+For each example, the complete source code is `available in Github <https://github.com/networktocode/diffsync/tree/main/examples>`_ in the `examples` directory
 
 .. mdinclude:: ../../../examples/01-multiple-data-sources/README.md
 .. mdinclude:: ../../../examples/02-callback-function/README.md