utils: Fix typo. It is ascii.
diff --git a/src/utils.c b/src/utils.c
index 2155885..405039f 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -43,7 +43,7 @@
 		return 'A' + (bcd - 0xa);
 }
 
-/* only works for numbers in ascci */
+/* only works for numbers in ascii */
 uint8_t char2bcd(char c)
 {
 	return c - 0x30;