Fixed "latest" tag

The variable for the latest tag didn't contain all the needed values.

Author: tobiasge

build.sh

@@ -229,7 +229,7 @@ for DOCKER_TARGET in "${DOCKER_TARGETS[@]}"; do
     MINOR=${BASH_REMATCH[2]}
 
     TARGET_DOCKER_SHORT_TAG="${DOCKER_SHORT_TAG-${DOCKER_REGISTRY}/${DOCKER_ORG}/${DOCKER_REPO}:v${MAJOR}.${MINOR}}"
-    TARGET_DOCKER_LATEST_TAG="latest"
+    TARGET_DOCKER_LATEST_TAG="${DOCKER_REGISTRY}/${DOCKER_ORG}/${DOCKER_REPO}:latest"
 
     if [ "${DOCKER_TARGET}" != "main" ]; then
       TARGET_DOCKER_SHORT_TAG="${TARGET_DOCKER_SHORT_TAG}-${DOCKER_TARGET}"