dnsdist: fix missing quote

Seeing the following error when running 'make defconfig':

tmp/.config-package.in:69874:warning: multi-line strings not supported

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

net/dnsdist/Makefile

@@ -82,7 +82,7 @@ menu "Configuration"
 		default y
 
 	config DNSDIST_SODIUM
-		bool "Build with libsodium
+		bool "Build with libsodium"
 		help
 			"Build with libsodium - for encrypted console connections, and DNSCrypt"
 		default y