Merge pull request #16502 from keeganwitt/gradle

Add arm64v8 to Java 21 image

library/gradle

@@ -55,7 +55,7 @@ GitCommit: 9a1868d61f289a711881d5af0299308968b0fc65
 Directory: jdk21
 
 Tags: 8.7.0-jdk21-alpine, 8.7-jdk21-alpine, 8-jdk21-alpine, jdk21-alpine
-Architectures: amd64
+Architectures: amd64, arm64v8
 GitCommit: 9a1868d61f289a711881d5af0299308968b0fc65
 Directory: jdk21-alpine