HSPC-177: updated gradle version to 8.5 and java to 21 #235

Job	Run time
Build epicbox-go image	2m 16s
Build epicbox/debian image	41s
Build epicbox-clojure image	35s
Build epicbox-haskell image	5m 44s
Build epicbox-hyperskill/go image	2m 26s
Build epicbox-hyperskill/gradle image	1m 51s
Build epicbox-hyperskill/gradle-spring image	1m 10s
Build epicbox-hyperskill/java image	47s
Build epicbox-hyperskill/node image	34s
Build epicbox-hyperskill/node-javascript image	1m 26s
Build epicbox-hyperskill/python image	47s
Build epicbox/hyperstyle image	2m 12s
Build epicbox/java image	38s
Build epicbox/kotlin image	58s
Build epicbox/node image	32s
Build epicbox/php image	30s
Build epicbox/pmd image	38s
Build epicbox/python 3.10 image	5m 46s
Build epicbox/python 3.11 image	5m 48s
Build epicbox/ruby image	2m 1s
Build epicbox/scala3 image	47s
Build epicbox/scala2 image	39s
Build epicbox/typescript image	40s
Build epicbox-hyperskill/gcc image	2m 21s
Build epicbox-gcc image	54s
Build epicbox/mono image	1m 24s
Clean untagged images	0s
	44m 5s

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