Improve the copyrights of the assets

tools/pv.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Fetch Google Analytics Pageviews reporting cache
 # and save as 'assets/data/pagevies.json'
@@ -6,12 +6,6 @@
 # Requirement:
 #   - jq
 #   - wget
-#
-# v2.0
-# https://github.com/cotes2020/jekyll-theme-chirpy
-# © 2019 Cotes Chung
-# MIT Licensed
-
 
 set -eu