fix typo

docs/modules/contributions/pages/contributions.adoc

@@ -284,7 +284,7 @@ a| *Available as SDK plugin*
 a| Yes
 
 a| *Work in progress*
-a| Abandoned but ther is a fork of the project that has been updated and can be found on {url-github}/stephengold/tonegodgui[GitHub].
+a| Abandoned but there is a fork of the project that has been updated and can be found on {url-github}/stephengold/tonegodgui[GitHub].
 
 |===