Add Let's Encrypt R10

Author: demarcush

README.md

@@ -195,10 +195,12 @@ This [Go code snippet](https://gist.github.com/d6cb41742a1ceb54d48cc286f3d5c5fa)
 
 ### Common certificate hashes
 
-* Let's Encrypt R3:
-  * `444ebd67bb83f8807b3921e938ac9178b882bd50aadb11231f044cf5f08df7ce`
 * Let's Encrypt E1:
   * `cc1060d39c8329b62b6fbc7d0d6df9309869b981e7e6392d5cd8fa408f4d80e6`
+* Let's Encrypt R3:
+  * `444ebd67bb83f8807b3921e938ac9178b882bd50aadb11231f044cf5f08df7ce`
+* Let's Encrypt R10:
+  * `e644ba6963e335fe765cb9976b12b10eb54294b42477764ccb3a3acca3acb2fc`
 * ZeroSSL:
   * `9a3a34f727deb9bca51003d9ce9c39f8f27dd9c5242901c2bab1a44e635a0219`