Edit changelog and add 2.0.0-M4 release notes.

Author: jxblum

spring-geode-project/spring-geode/src/main/resources/changelog.txt

@@ -4,6 +4,29 @@ https://github.com/spring-projects/spring-boot-data-geode
 =========================================================
 
 
+Changes in version 2.0.0-M4 (2022-07-21)
+----------------------------------------
+Aligns SBDG with Spring Boot 3.0.0-M4.
+
+* Built with Java 17, JDK 17+35-LTS-2724 (2021-09-14 LTS).
+* Improves the spring-geode-starter-logging by providing better integration with Spring Boot logging along with
+modularizing the SLF4j, Logback configuration allowing users to customize per component, such as Apache Geode component
+logging independent of Spring Boot and Spring components, offering finer grain control.
+* Upgrades to Apache Geode 1.15.0.
+* Upgrades to Gradle 7.5.
+* Upgrades to Freefair Lombok Gradle Plugin 6.5.0.3.
+* Upgrades to Spring Framework 6.0.0-M5
+* Upgrades to Spring Boot 3.0.0-M4.
+* Upgrades to Spring Cloud Bindings 1.10.0.
+* Upgrades to Spring Data BOM 2022.0.0-M5 (Turing-M5).
+* Upgrades to Spring Data for Apache Geode 3.0.0-M5.
+* Upgrades to Spring Session BOM 2022.0.0-M2.
+* Upgrades to Spring Session for Apache Geode 3.0.0-M3.
+* Upgrades to Spring Test for Apache Geode 1.0.0-M6.
+* Upgrades to Testcontainers 1.17.3.
+* Upgrades to VMware Tanzu (Pivotal) GemFire 9.15.0.
+
+
 Changes in version 1.7.2 (2022-07-21)
 -------------------------------------
 Aligns SBDG with Spring Boot 2.7.2.