package/squid: remove trailing whitespace

Commit 7792c4f1bc introduced trailing whitespace. Remove it.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/276636839

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/squid/squid.mk

@@ -11,7 +11,7 @@ SQUID_LICENSE = GPL-2.0+
 SQUID_LICENSE_FILES = COPYING
 SQUID_DEPENDENCIES = libcap host-libcap libxml2 host-pkgconf \
 	$(if $(BR2_PACKAGE_LIBNETFILTER_CONNTRACK),libnetfilter_conntrack)
-# We're patching acinclude/os-deps.m4 
+# We're patching acinclude/os-deps.m4
 SQUID_AUTORECONF = YES
 SQUID_CONF_ENV = \
 	ac_cv_epoll_works=yes \