SpringBoot Harmonize use of StructuredLogEncoder (formerly StructuredLoggingEncoder)

Fix Typo in Spring Boot structured logging, console + file

Comment From: snicoll

Good catch @nkolosnjaji - I've found a few more use of the old term that I've fixed in https://github.com/spring-projects/spring-boot/commit/33711828f984f23897775e4ec0441b5720be792f. Thanks again!