Bump Go to v1.21.7

Signed-off-by: Sunnatillo <sunnat.samadov@est.tech>

Author: Sunnatillo

Dockerfile

@@ -1,5 +1,5 @@
 # Support FROM override
-ARG BUILD_IMAGE=docker.io/golang:1.20.14@sha256:8f9af7094d0cb27cc783c697ac5ba25efdc4da35f8526db21f7aebb0b0b4f18a
+ARG BUILD_IMAGE=docker.io/golang:1.21.7@sha256:549dd88a1a53715f177b41ab5fee25f7a376a6bb5322ac7abe263480d9554021
 ARG BASE_IMAGE=gcr.io/distroless/static:nonroot@sha256:9ecc53c269509f63c69a266168e4a687c7eb8c0cfd753bd8bfcaa4f58a90876f
 
 # Build the manager binary

Makefile

@@ -2,7 +2,7 @@ RUN_NAMESPACE = metal3
 GO_TEST_FLAGS = $(TEST_FLAGS)
 DEBUG = --debug
 COVER_PROFILE = cover.out
-GO_VERSION ?= 1.20.14
+GO_VERSION ?= 1.21.7
 
 ROOT_DIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))