Update redis/redis from 7.0.14 to 7.0.15

Changelog: changed

Author: dependencies-bot

config/software/redis.rb

@@ -25,7 +25,7 @@
 dependency 'config_guess'
 dependency 'openssl' unless Build::Check.use_system_ssl?
 
-version = Gitlab::Version.new('redis', '7.0.14')
+version = Gitlab::Version.new('redis', '7.0.15')
 default_version version.print(false)
 
 source git: version.remote