Set req java in pom to 21. Runtime was already 21.

Author: meier-rene

README.md

@@ -6,7 +6,7 @@ Spring Boot. It uses the RecordParserDefinition from the original
 [MassBank project](https://github.com/MassBank/MassBank-web). 
 
 ## Requirements
-- Java 17
+- Java 21
 - Spring Boot 3.4
 - maven
 

pom.xml

@@ -15,7 +15,7 @@
     <description>Microservice for the export of different file formats for MassBank 3</description>
 
     <properties>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
         <argLine/>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <timestamp>2025-02-12T15:13:00+01:00</timestamp>