add updated server properties missed in last commit

src/main/resources/server.properties

@@ -80,3 +80,7 @@ required-resource-pack=false
 
 #JSON formatted text to show when prompting the player to install the resource pack (May be left blank)
 resource-pack-prompt={"text":"","extra":[{"text":"Install server resource pack!","color":"yellow"}]}
+
+#Whether to enforce the player allowlist.  If true, loads and enforces the allowlist from 'allowlist.json'
+#in the same format as vanilla minecraft servers
+enforce-allowlist=false