chore: Fix release documentation

Author: adangel

README.rdoc

@@ -167,5 +167,6 @@ The tool creates the following folders:
 * Push to main.
 * Push the tag. Github Actions will build and publish the new gem
 * A github release is automatically created, verify it on https://github.com/pmd/pmd-regression-tester/releases
-* To make pmd's main CI use the new version (in [pmd/pmd](https://github.com/pmd/pmd/)), go to the root directory and run `bundle lock --update`. Commit these changes. 
+* To make pmd's main CI use the new version (in [pmd/pmd](https://github.com/pmd/pmd/)),
+  go to the directory ".ci/files" and run `bundle lock --update`. Commit these changes.
 * Rename milestone to version, close it and create a new "Next" milestone: https://github.com/pmd/pmd-regression-tester/milestones