docs: Object pools are supported for internal projects

326d1ae5 delivered on object pools for
internal projects, on top of public ones. This change updates the
documentation to reflect that.

doc/administration/repository_storage_types.md

@@ -122,7 +122,7 @@ Do not run `git prune` or `git gc` in pool repositories! This can
 cause data loss in "real" repositories that depend on the pool in
 question.
 
-Forks of public projects are deduplicated by creating a third repository, the
+Forks of public and internal projects are deduplicated by creating a third repository, the
 object pool, containing the objects from the source project. Using
 `objects/info/alternates`, the source project and forks use the object pool for
 shared objects. Objects are moved from the source project to the object pool