Correct table html with close tag for </thead>

Signed-off-by: Kat Samperi <kat.samperi@gmail.com>

Author: kizzie

docs/reference/commandline/service_create.md

@@ -764,6 +764,7 @@ The options you can specify are:
   <th>Long syntax</th>
   <th>Description</th>
 </tr>
+</thead>
 <tr>
   <td>published and target port </td>
   <td><tt></tt></td>