docs: fix simple typo, othrwise -> otherwise (#237)

There is a small typo in src/path/path.c.

Should read `otherwise` rather than `othrwise`.

src/path/path.c

@@ -282,7 +282,7 @@ void chop_finality(char *path)
 
 /**
  * Put in @path the result of readlink(/proc/@pid/fd/@fd).  This
- * function returns -errno if an error occured, othrwise 0.
+ * function returns -errno if an error occured, otherwise 0.
  */
 int readlink_proc_pid_fd(pid_t pid, int fd, char path[PATH_MAX])
 {