Edit changelog and add 1.3.4.RELEASE notes.

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

@@ -1,7 +1,24 @@
-SPRING BOOT FOR APACHE GEODE & PIVOTAL GEMFIRE CHANGELOG
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+SPRING BOOT FOR APACHE GEODE & VMWARE TANZU GEMFIRE CHANGELOG
+--------------------------------------------------------------
 https://github.com/spring-projects/spring-boot-data-geode
-=========================================================
+==============================================================
+
+
+Changes in version 1.3.4.RELEASE (2020-09-17)
+---------------------------------------------
+Upgrades SBDG to Spring Boot 2.3.4.RELEASE.
+
+* Adds cross-references between reference documentation and Sample Guides & Code based on topic.
+* Edits reference documentation and corrects compiler syntax errors in documentation code snippets.
+* Upgrades to Spring Framework 5.2.9.RELEASE.
+* Upgrades to Spring Boot 2.3.4.RELEASE.
+* Upgrades to Spring Data Neumann-SR4.
+* Upgrades to Spring Data for Apache Geode & VMware Tanzu GemFire 2.3.4.RELEASE.
+* Upgrades to Spring Session BOM Dragonfruit-SR1.
+* Upgrades to Spring Session for Apache Geode & VMware Tanzu GemFire 2.3.1.RELEASE.
+* Upgrades to Spring Test for Apache Geode & VMware Tanzu GemFire 0.0.19.RELEASE.
+* Upgrades to Gradle 6.6.1.
+* Upgrades to Mockito 3.5.11.
 
 
 Changes in version 1.2.10.RELEASE (2020-09-17)