README: update GPG keys

Author: jrfnl

README.md

@@ -48,7 +48,7 @@ php phpcbf.phar -h
 ```
 
 These Phars are signed with the official Release key for PHPCS with the
-fingerprint `95DE 904A B800 754A 11D8 0B60 5E6D DE99 8AB7 3B8E`.
+fingerprint `689D AD77 8FF0 8760 E046 228B A978 2203 05CD 5C32`.
 
 ### Composer
 If you use Composer, you can install PHP_CodeSniffer system-wide with the following command:
@@ -76,8 +76,8 @@ You will then be able to run PHP_CodeSniffer from the vendor bin directory:
 ### Phive
 If you use Phive, you can install PHP_CodeSniffer as a project tool using the following commands:
 ```bash
-phive install --trust-gpg-keys 95DE904AB800754A11D80B605E6DDE998AB73B8E phpcs
-phive install --trust-gpg-keys 95DE904AB800754A11D80B605E6DDE998AB73B8E phpcbf
+phive install --trust-gpg-keys 689DAD778FF08760E046228BA978220305CD5C32 phpcs
+phive install --trust-gpg-keys 689DAD778FF08760E046228BA978220305CD5C32 phpcbf
 ```
 You will then be able to run PHP_CodeSniffer from the `tools` directory:
 ```bash