Configure njord publisher and releaseURL in pom

Otherwise people not having according `settings.xml` get misleading
error messages during release. Compare with
maveniverse/njord#162 (comment)

Author: kwin

pom.xml

@@ -357,7 +357,9 @@ limitations under the License.
     <sisuMavenPluginVersion>0.9.0.M4</sisuMavenPluginVersion>
     <invoker.streamLogsOnFailures>true</invoker.streamLogsOnFailures>
 
-    <!-- njord configuration -->
+    <!-- njord configuration (https://maveniverse.eu/docs/njord/configuration/#njord-properties) -->
+    <njord.releaseUrl>njord:template:release-sca</njord.releaseUrl>
+    <njord.publisher>sonatype-cp</njord.publisher>
     <njord.autoPublish>true</njord.autoPublish>
     <njord.publishingType>automatic</njord.publishingType>
     <njord.waitForStates>true</njord.waitForStates>

src/site/markdown/index.md

@@ -14,10 +14,6 @@ Release manager should include the following sections in your personal `settings
       <id>sonatype-central-portal</id>
       <username>jqhacker</username> <!-- central portal token -->
       <password>SeCrEt</password> <!-- central portal token -->
-      <configuration>
-        <njord.publisher>sonatype-cp</njord.publisher>
-        <njord.releaseUrl>njord:template:release-sca</njord.releaseUrl>
-      </configuration>
     </server>
   </servers>
 </settings>