Fix typos in comments
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 27c139b..a1b9009 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1280,7 +1280,7 @@
  * CRIME attack. Before enabling this option, you should examine with care if
  * CRIME or similar exploits may be a applicable to your use case.
  *
- * \note Currently compression can't bu used with DTLS.
+ * \note Currently compression can't be used with DTLS.
  *
  * Used in: library/ssl_tls.c
  *          library/ssl_cli.c