Update faq.mdx (#5958)

Author: RoRoJ

pages/key-manager/faq.mdx

@@ -53,6 +53,6 @@ Recovering keys [scheduled for deletion](/key-manager/concepts/#scheduled-deleti
 
 ## How is Key Manager billed?
 
-- Symmeric and asymmetric key storage is billed €0.04 per key version monthly.
-- Symmeric and asymmetric key operation is billed €0.03 per 10,000 requests.
-- Restoring a key scheduled for deletion is billed €0.01 per key.
+- Symmetric and asymmetric key storage is billed €0.04 per key version monthly.
+- Symmetric and asymmetric key operations are billed €0.03 per 10,000 requests.
+- Restoring a key scheduled for deletion is billed €0.01 per key.