Replaced user recommendation with link to git-gc documentation

doc/administration/housekeeping.md

@@ -6,7 +6,7 @@ The housekeeping function runs `git gc` on the current project git repository.
 
 `git gc` runs a number of housekeeping tasks, such as compressing file revisions (to reduce disk space and increase performance) and removing unreachable objects which may have been created from prior invocations of git add.
 
-Users are encouraged to run this task on a regular basis to maintain good disk space utilization and good operating performance.
+See https://www.kernel.org/pub/software/scm/git/docs/git-gc.html for details.
 
 ## Where can I find it?