Bump vaadin.version from 24.8.0 to 24.8.1 (#2520)

* Bump vaadin.version from 24.8.0 to 24.8.1

Bumps `vaadin.version` from 24.8.0 to 24.8.1.

Updates `com.vaadin:vaadin-bom` from 24.8.0 to 24.8.1

Updates `com.vaadin:vaadin-maven-plugin` from 24.8.0 to 24.8.1
- [Release notes](https://github.com/vaadin/platform/releases)
- [Commits](https://github.com/vaadin/platform/compare/24.8.0...24.8.1)

---
updated-dependencies:
- dependency-name: com.vaadin:vaadin-bom
  dependency-version: 24.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.vaadin:vaadin-maven-plugin
  dependency-version: 24.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix version migration - add prepare-frontend goal

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-simple-ui/pom.xml

@@ -25,7 +25,7 @@
     <name>hawkBit :: Simple UI</name>
 
     <properties>
-        <vaadin.version>24.8.0</vaadin.version>
+        <vaadin.version>24.8.1</vaadin.version>
     </properties>
 
     <repositories>
@@ -102,6 +102,7 @@
                 <executions>
                     <execution>
                         <goals>
+                            <goal>prepare-frontend</goal>
                             <goal>build-frontend</goal>
                         </goals>
                         <phase>compile</phase>