Fix json_asprintf docstrings

CL: Fix json_asprintf docstrings

PUBLISHED_FROM=8a5dab557d1bd9b83181e795010d727202d20bcf

README.md

@@ -293,7 +293,7 @@ int json_fprintf(const char *file_name, const char *fmt, ...);
 int json_vfprintf(const char *file_name, const char *fmt, va_list ap);
 ```
 
-## `json_sprintf()`, `json_vsprintf()`
+## `json_asprintf()`, `json_vasprintf()`
 
 ```c
 /*

frozen.h

@@ -171,7 +171,7 @@ int json_vfprintf(const char *file_name, const char *fmt, va_list ap);
  * Example:
  *
  * ```c
- *   char *str = json_sprintf("{a:%H}", 3, "abc");
+ *   char *str = json_asprintf("{a:%H}", 3, "abc");
  *   printf("%s\n", str);  // Prints "616263"
  *   free(str);
  * ```