Fix typos in json.dict

fuzzing/json.dict

@@ -25,8 +25,8 @@ escape_sequence_r="\\r"
 escape_sequence_t="\\t"
 escape_sequence_quote="\\\""
 escape_sequence_backslash="\\\\"
-escapce_sequence_slash="\\/"
-escpae_sequence_utf16_base="\\u"
+escape_sequence_slash="\\/"
+escape_sequence_utf16_base="\\u"
 escape_sequence_utf16="\\u12ab"
 
 number_integer="1"