chore(deps): update docker.io/plugins/docker docker tag to v20.18.8

Makefile

@@ -11,6 +11,7 @@ BUILD_IMAGE_NAMESPACE?=${BUILD_IMAGE_REGISTRY_USER}
 BUILD_IMAGE_REPOSITORY:=build-image
 BUILD_IMAGE_VERSION?=latest
 BUILD_IMAGE_FULLY_QUALIFIED=${BUILD_IMAGE_REGISTRY_HOST}/${BUILD_IMAGE_NAMESPACE}/${BUILD_IMAGE_REPOSITORY}:${BUILD_IMAGE_VERSION}
+BUILD_IMAGE_UNQUALIFIED=${BUILD_IMAGE_NAMESPACE}/${BUILD_IMAGE_REPOSITORY}:${BUILD_IMAGE_VERSION}
 
 # MARKDOWNLINT_IMAGE
 MARKDOWNLINT_IMAGE_REGISTRY_HOST?=git.cryptic.systems
@@ -27,14 +28,15 @@ container-image/build:
 		--no-cache \
 		--pull \
 		--tag ${BUILD_IMAGE_FULLY_QUALIFIED} \
-		--tag \
+		--tag ${BUILD_IMAGE_UNQUALIFIED} \
 		.
 
 # DELETE CONTAINER IMAGE
 # ==============================================================================
 PHONY:=container-image/delete
 container-image/delete:
-	- ${CONTAINER_RUNTIME} image rm ${BUILD_IMAGE_FULLY_QUALIFIED}
+	- ${CONTAINER_RUNTIME} image rm ${BUILD_IMAGE_FULLY_QUALIFIED} ${BUILD_IMAGE_UNQUALIFIED}
+	- ${CONTAINER_RUNTIME} image rm ${BASE_IMAGE_FULLY_QUALIFIED}
 
 # PUSH CONTAINER IMAGE
 # ==============================================================================