Update generated type definition file

Author: AlphaHydrae

index.d.ts

@@ -18,13 +18,13 @@
  *
  * @example
  * import { execvp } from '@alphahydrae/exec';
- * execvp('ls', ['ls', '-l', '.']);
+ * execvp('ls', ['/bin/ls', '-l', '.']);
  *
  * @param {string} file The file to execute. If not a path, the PATH environment
  *                      variable is searched.
  * @param {string[]} args The arguments to pass to the new process. Note that
- *                        the first argument should be the name of the file
- *                        being executed.
+ *                        the first argument, by convention, should point to
+ *                        the filename associated with the file being executed.
  * @throws {Error} If the execvp system call fails.
  */
 export declare function execvp(file: string, args: Array<string>): void