[doc] Fix links to making rulesets

docs/pages/pmd/userdocs/best_practices.md

@@ -21,7 +21,7 @@ Then, run rules, that detect empty `if` statements and such-like. You can find t
 After that, look at all the categories and select the rules, that are useful for your project.
 You can find an overview of the rules on the [Rule Index](pmd_rules_java.html).
 
-Use the rules you like [via a custom ruleset](pmd_userdocs_understanding_rulesets.html).
+Use the rules you like [via a custom ruleset](pmd_userdocs_making_rulesets.html).
 
 ## PMD rules are not set in stone
 

docs/pages/pmd/userdocs/tools/maven.md

@@ -109,7 +109,7 @@ The value of the 'ruleset' element can either be a relative address, an absolute
 A clean strategy for customizing which rules to use for a project is to write a ruleset file.
 In this file you can define which rules to use, add custom rules, and
 customizing which rules to include/exclude from official rulesets. More information on
-writing a ruleset can be found [here](pmd_userdocs_understanding_rulesets.html).
+writing a ruleset can be found [here](pmd_userdocs_making_rulesets.html).
 Note that if you include other rulesets in your own rulesets, you have to be sure that the plugin
 will be able to resolve those other ruleset references.
 
@@ -236,7 +236,7 @@ To specify a set of official, built-in rulesets to be used set them in the prope
 A clean strategy for customizing which rules to use for a project is to write a ruleset file.
 In this file you can define which rules to use, add custom rules, and
 customizing which rules to include/exclude from official rulesets. More information on
-writing a ruleset can be found [here](/pmd_userdocs_understanding_rulesets.html).
+writing a ruleset can be found [here](pmd_userdocs_making_rulesets.html).
 
 Add to the root of your Maven project a pmd.xml file which contains the ruleset mentioned in
 the previous paragraph. Add the following property to your project now: