build: downgrade to Java 8

Author: javier-godoy

pom.xml

@@ -13,8 +13,8 @@
 
     <properties>
         <vaadin.version>24.9.1</vaadin.version>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <drivers.dir>${project.basedir}/drivers</drivers.dir>