Update eclipse-temurin Docker tag to v21.0.7_6-jdk-alpine (#366)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Earthfile

@@ -8,7 +8,7 @@ ARG --global --required MAVEN_REGISTRY_RELEASES
 ARG --global --required MAVEN_REGISTRY_SNAPSHOTS
 
 build:
-    FROM eclipse-temurin:21.0.6_7-jdk-alpine
+    FROM eclipse-temurin:21.0.7_6-jdk-alpine
     DO github.com/genestack/earthly-libs+GRADLE_PREPARE
 
     CACHE /root/.gradle/caches