GH-61 - Include all modules in release preparations.

Added dedicated prepare-release profile to make sure that all modules get their versions updated on mvn release:prepare. This is required to make sure the tag lands on a commit that especially has the distribution module updated so that the documentation publication actually produces the artifacts for the released version.

etc/build-and-releases.adoc

@@ -28,6 +28,7 @@
 [source]
 ----
 ./mvnw release:prepare \
+  -Pprepare-release \
   -DreleaseVersion="${version}" \
   -DdevelopmentVersion="${devVersion}" \
   -DscmReleaseCommitComment="${ticketId} - Release version ${version}." \

pom.xml

@@ -96,6 +96,18 @@ limitations under the License.
 
 		</profile>
 
+		<profile>
+
+			<id>prepare-release</id>
+
+			<modules>
+				<module>spring-modulith-distribution</module>
+				<module>spring-modulith-example</module>
+				<module>spring-modulith-integration-test</module>
+			</modules>
+
+		</profile>
+
 		<profile>
 
 			<id>ci</id>