Fix typo

Signed-off-by: Emiliano Suñé <emiliano.sune@gmail.com>

Author: esune

docs/chart-upgrade-guide.md

@@ -1,6 +1,6 @@
 # Traction Helm Chart Values Migration Guide
 
-This document contains information related to breaking/major changes to the Traction Helm Chart and provides guidelines for migrating/upgrading deployments to newer chart versoins.
+This document contains information related to breaking/major changes to the Traction Helm Chart and provides guidelines for migrating/upgrading deployments to newer chart versions.
 
 ## 0.4.0