g.search.module: fix typo in the manual (merge https://trac.osgeo.org/grass/changeset/68294 from trunk)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@68295 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/g.search.modules/g.search.modules.html

@@ -1,6 +1,6 @@
 <h2>DESCRIPTION</h2>
 
-<em>r.search.module</em> searches for given keyword in GRASS modules name,
+<em>g.search.module</em> searches for given keyword in GRASS modules name,
 description, keywords and optionally manpages too.
 
 <h2>NOTES</h2>