Documentation links sanity checker (#4701)

* Fix broken links

* Fixed link

* Added links checker

* link updates from the link checker

* Final corrections to allow checklinks to run without errors

* Removed whitespace

* Fixed codacy errors/warnings

collectors/python.d.plugin/springboot/README.md

@@ -119,4 +119,4 @@ You can disable the default charts by set `defaults.<chart-id>: false`.
 
 The dimension name of extras charts should replace `.` to `_`.
 
-Please check [springboot.conf](https://github.com/netdata/netdata/tree/master/collectors/python.d.plugin/springboot/springboot.conf) for more examples.
+Please check [springboot.conf](springboot.conf) for more examples.