Fix typo in announcement (#663)

diff --git a/landing-pages/site/content/en/announcements/_index.md b/landing-pages/site/content/en/announcements/_index.md
index 9e5aa7d..4c607e3 100644
--- a/landing-pages/site/content/en/announcements/_index.md
+++ b/landing-pages/site/content/en/announcements/_index.md
@@ -15,7 +15,7 @@
 
 # September 22, 2022
 
-Airflow PMC welcomes new Airlow Committer:
+Airflow PMC welcomes new Airflow Committer:
 
 * **Pierre Jeambrun** ([@pierrejeambrun](https://github.com/pierrejeambrun))