Mk/Uses/go.mk: Fix indentations

[pre-commit] ERROR: go.mk is not properly indented -- please use
/tmp/check_indentations-go.mk.KpLlFV8WBv/go.mk which was created using
Tools/scripts/indent_make_if.pl

Reported by:	'check_mk_indentations' pre-commit hook

Mk/Uses/go.mk

@@ -90,11 +90,11 @@ GO_PKGNAME=	${PORTNAME}
 GO_TARGET?=	${GO_PKGNAME}
 GO_TESTTARGET?=	./...
 
-.if !defined(PIE_UNSAFE) && defined(WITH_PIE) && ${ARCH} == amd64
+.  if !defined(PIE_UNSAFE) && defined(WITH_PIE) && ${ARCH} == amd64
 GO_BUILDFLAGS+= -buildmode=pie
-.else
+.  else
 GO_BUILDFLAGS+= -buildmode=exe
-.endif
+.  endif
 GO_BUILDFLAGS+= -v -trimpath
 .  if !defined(WITH_DEBUG) && empty(GO_BUILDFLAGS:M-ldflags*)
 GO_BUILDFLAGS+=	-ldflags=-s