fix go version comparison (#524)

Author: nowgoo

build.mk

@@ -27,7 +27,7 @@ clean:
 .PHONY:check-go
 check-go:
 	$(call check_tool,$(GO),'GO')
-	@if [ "$$(printf '%s\n' "$$($(GO) version)" $(MIN_GO_VERSION) | sort -V | head -n1)" != "1.21" ]; then \
+	@if [ "$$(printf '%s\n' "$$($(GO) version)" $(MIN_GO_VERSION) | sort -V | head -n1)" != $(MIN_GO_VERSION) ]; then \
 		echo "Error: Go version should be $(MIN_GO_VERSION) or above"; \
 		exit 1; \
 	fi