Update dependency puppet/extlib to v8

Author: renovate[bot]

puppet/Puppetfile

@@ -8,7 +8,7 @@ mod 'puppet/augeasproviders_shellvar', '7.0.0'
 mod 'puppet/augeasproviders_ssh', '7.0.0'
 mod 'puppet/chrony', '5.0.0'
 mod 'puppet/epel', '6.0.0'
-mod 'puppet/extlib', '7.5.1'
+mod 'puppet/extlib', '8.0.0'
 mod 'puppet/grafana_alloy', '2.1.0'
 mod 'puppet/jenkins', '7.0.0'
 mod 'puppet/letsencrypt', '13.3.0'