package/restclient-cpp: drop spurious space

Drop spurious space added by commit
014c47cfbf014e916efef688ac5f892e5082d188

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/restclient-cpp/restclient-cpp.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 RESTCLIENT_CPP_VERSION = 0.5.2
-RESTCLIENT_CPP_SITE =  $(call github,mrtazz,restclient-cpp,$(RESTCLIENT_CPP_VERSION))
+RESTCLIENT_CPP_SITE = $(call github,mrtazz,restclient-cpp,$(RESTCLIENT_CPP_VERSION))
 RESTCLIENT_CPP_LICENSE = MIT
 RESTCLIENT_CPP_LICENSE_FILES = LICENSE
 RESTCLIENT_CPP_INSTALL_STAGING = YES