update Blog in docs

Author: pratu16x7

README.md

@@ -84,4 +84,6 @@ If you want to contribute:
 This repository has been released under the [MIT License](LICENSE)
 
 ------------------
-Project maintained by [Frappe](https://frappe.io).
+Project maintained by [Frappe](https://frappe.io).
+Used in [ERPNext](https://erpnext.com). Read the [blog post](https://medium.com/@pratu16x7/so-we-decided-to-create-our-own-charts-a95cb5032c97).
+

docs/index.html

@@ -265,7 +265,9 @@ <h6 class="margin-vertical-rem">
     <div class="built-with-frappe text-center" style="margin-top: -20px">
         <img style="padding: 5px; width: 40px; background: #fff" class="frappe-bird" src="https://frappe.github.io/frappe/assets/img/frappe-bird-grey.svg">
         <p style="margin: 24px 0 0px 0; font-size: 15px">
-          Project maintained by <a href="https://frappe.io" target="_blank">Frappe</a>
+          Project maintained by <a href="https://frappe.io" target="_blank">Frappe</a>.
+          Used in <a href="https://erpnext.com" target="_blank">ERPNext</a>.
+          Read the <a href="https://medium.com/@pratu16x7/so-we-decided-to-create-our-own-charts-a95cb5032c97" target="_blank">blog post</a>.
         </p>
         <p style="margin: 24px 0 80px 0; font-size: 12px">
           Data from the <a href="https://www.amsmeteors.org" target="_blank">American Meteor Society</a>,