chore(deps): update dependency org.pitest:pitest-maven to v1.21.0

Author: renovate[bot]

pom.xml

@@ -31,7 +31,7 @@
         </sonar.exclusions>
         <skipSurefireReport>true</skipSurefireReport>
         <!-- Pi Test-->
-        <pitest.version>1.20.6</pitest.version>
+        <pitest.version>1.21.0</pitest.version>
         <pitest.junit.version>1.2.3</pitest.junit.version>
         <jackson.version>2.19.0</jackson.version>
         <bpm.version>1.0.17</bpm.version>