docker: update to 29.6.1

https://docs.docker.com/engine/release-notes/29/#2961

Also fix SPACE:= formatting.
Signed-off-by: Ismail Kundakci <ism.kundakci@hotmail.com>

utils/docker/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=docker
-PKG_VERSION:=29.4.1
+PKG_VERSION:=29.6.1
 PKG_RELEASE:=1
 PKG_LICENSE:=Apache-2.0
 PKG_LICENSE_FILES:=LICENSE
@@ -10,8 +10,8 @@ PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_GIT_URL:=github.com/docker/cli
 PKG_GIT_REF:=v$(PKG_VERSION)
 PKG_SOURCE_URL:=https://codeload.$(PKG_GIT_URL)/tar.gz/$(PKG_GIT_REF)?
-PKG_HASH:=b45d935ab8f5faff8b0a03eb6c5c658636f47bc8170d892152b8eb57f5931315
-PKG_GIT_SHORT_COMMIT:=055a478 # SHA1 used within the docker executables
+PKG_HASH:=74d14dd212b07cd3328989dc6a029dde2ebbe6a878199eaaafad54916f456194
+PKG_GIT_SHORT_COMMIT:=8900f1d # SHA1 used within the docker executables
 
 PKG_MAINTAINER:=Gerard Ryan <G.M0N3Y.2503@gmail.com>
 
@@ -24,7 +24,7 @@ include $(INCLUDE_DIR)/package.mk
 include ../../lang/golang/golang-package.mk
 
 EMPTY:=
-SPACE:= $(EMPTY) $(EMPTY)
+SPACE:=$(EMPTY) $(EMPTY)
 ARCH_DEPENDS:=@($(subst $(SPACE),||,$(strip $(filter-out mips mips64 mipsel mips64el,$(subst ||,$(SPACE),$(patsubst @(%),%,$(GO_ARCH_DEPENDS)))))))
 
 define Package/docker