Merge pull request #1018 from bosch-io/fix_migration_to_new_spring_boot_version

Update Spring Boot to 2.3.7.RELEASE

hawkbit-runtime/hawkbit-update-server/src/main/resources/application.properties

@@ -12,6 +12,11 @@ spring.security.user.name=admin
 spring.security.user.password={noop}admin
 spring.main.allow-bean-definition-overriding=true
 
+# Http Encoding
+server.servlet.encoding.charset=UTF-8
+server.servlet.encoding.enabled=true
+server.servlet.encoding.force=true
+
 # DDI authentication configuration
 hawkbit.server.ddi.security.authentication.anonymous.enabled=false
 hawkbit.server.ddi.security.authentication.targettoken.enabled=false