doc: patch-id: see also git-cherry(1)

git-cherry(1) links to this command. These two commands are similar and
we also mention it in the “Examples” section now. Let’s link to it.

Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: LemmingAvalanche

Documentation/git-patch-id.adoc

@@ -106,6 +106,10 @@ join -a1 "$for_branch" "$for_upstream" | cut -d' ' -f2,3
 Now the first column shows the commit from your branch and the second
 column shows the patch ID equivalent commit, if it exists.
 
+SEE ALSO
+--------
+linkgit:git-cherry[1]
+
 GIT
 ---
 Part of the linkgit:git[1] suite