examples: fixed path for docs
MODIFY
examples/custom_mutators/README.md
examples/custom_mutators/README.md
# Examples for the custom mutator
These are example and helper files for the custom mutator feature.
-See [docs/custom_mutators.md](../docs/custom_mutators.md) for more information
+See [docs/custom_mutators.md](../../docs/custom_mutators.md) for more information
Note that if you compile with python3.7 you must use python3 scripts, and if
you use python2.7 to compile python2 scripts!

examples: fixed path for docs (#563)