Update CHANGELOG.md

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## [Unreleased](https://github.com/mitre/heimdall_tools/tree/HEAD)
+
+[Full Changelog](https://github.com/mitre/heimdall_tools/compare/v1.3.23.pre4...HEAD)
+
+**Merged pull requests:**
+
+- Rubygems automatically trims the word \_api\_key when referencing the key [\#39](https://github.com/mitre/heimdall_tools/pull/39) ([rbclark](https://github.com/rbclark))
+
+## [v1.3.23.pre4](https://github.com/mitre/heimdall_tools/tree/v1.3.23.pre4) (2020-03-31)
+
+[Full Changelog](https://github.com/mitre/heimdall_tools/compare/v1.3.23.pre3...v1.3.23.pre4)
+
+**Merged pull requests:**
+
+- Cleanup GPR and Rubygems release flow [\#38](https://github.com/mitre/heimdall_tools/pull/38) ([rbclark](https://github.com/rbclark))
+
 ## [v1.3.23.pre3](https://github.com/mitre/heimdall_tools/tree/v1.3.23.pre3) (2020-03-31)
 
 [Full Changelog](https://github.com/mitre/heimdall_tools/compare/v1.3.23.pre2...v1.3.23.pre3)
@@ -36,10 +52,6 @@
 
 [Full Changelog](https://github.com/mitre/heimdall_tools/compare/v1.3.18...v1.3.19)
 
-**Merged pull requests:**
-
-- Remove all gems from Gemfile and declare them properly in the gemspec [\#33](https://github.com/mitre/heimdall_tools/pull/33) ([rbclark](https://github.com/rbclark))
-
 ## [v1.3.18](https://github.com/mitre/heimdall_tools/tree/v1.3.18) (2020-03-28)
 
 [Full Changelog](https://github.com/mitre/heimdall_tools/compare/v1.3.17...v1.3.18)
@@ -150,6 +162,7 @@
 
 **Merged pull requests:**
 
+- Remove all gems from Gemfile and declare them properly in the gemspec [\#33](https://github.com/mitre/heimdall_tools/pull/33) ([rbclark](https://github.com/rbclark))
 - Updating required nori gem version [\#16](https://github.com/mitre/heimdall_tools/pull/16) ([rx294](https://github.com/rx294))
 - Populate shasum and runtime field  [\#14](https://github.com/mitre/heimdall_tools/pull/14) ([rx294](https://github.com/rx294))
 - Updates as per feedback [\#13](https://github.com/mitre/heimdall_tools/pull/13) ([rx294](https://github.com/rx294))