fix a typo in programming.md (DIYgod#12452)

Author: moodyhunter

docs/programming.md

@@ -302,7 +302,7 @@ GitHub 官方也提供了一些 RSS:
 
 <Route author="LanceZhu" example="/github/starred_repos/DIYgod" path="/github/starred_repos/:user" :paramsDesc="['用户名']" radar="1" rssbud="1"/>
 
-### 仓库 Contirbutors
+### 仓库 Contributors
 
 <Route author="zoenglinghou" example="/github/contributors/DIYgod/RSSHub" path="/github/contributors/:user/:repo/:order?/:anon?" :paramsDesc="['用户名', '仓库名', 'Commit 数量排序顺序，desc和asc（默认desc降序）', '是否包括匿名用户，默认不包含，任意值包含匿名用户']" radar="1" rssbud="1"/>