MINOR: [Website] Fix a typo (#113)

diff --git a/_posts/2021-04-26-4.0.0-release.md b/_posts/2021-04-26-4.0.0-release.md
index c885f3e..8619271 100644
--- a/_posts/2021-04-26-4.0.0-release.md
+++ b/_posts/2021-04-26-4.0.0-release.md
@@ -54,7 +54,7 @@
 There are Linux packages for C++ and C GLib. They were provided by Bintray
 but [Bintray is no longer available as of 2021-05-01][5]. They are provided
 by Artifactory now. Users needs to change the install instructions because the URL
-hsa changed. See [the install page][6] for new instructions. Here is a
+has changed. See [the install page][6] for new instructions. Here is a
 summary of needed changes.
 
 For Debian GNU Linux and Ubuntu users: