chore: fix messed up changelogs in common and internal (#340)

Missed the internal and common changelogs in my previous PR.

Author: cwaldren-ld

libs/common/CHANGELOG.md

@@ -1,16 +1,5 @@
 # Changelog
 
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-sse-client bumped from 0.1.0 to 0.1.1
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-sse-client bumped from 0.1.1 to 0.1.2
 
 ## [1.2.0](https://github.com/launchdarkly/cpp-sdks/compare/launchdarkly-cpp-common-v1.1.0...launchdarkly-cpp-common-v1.2.0) (2023-12-13)
 

libs/internal/CHANGELOG.md

@@ -1,50 +1,6 @@
 # Changelog
 
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.1.0 to 0.2.0
-
-### Dependencies
-
-
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.2.0 to 0.3.0
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.3.0 to 0.3.1
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.3.2 to 0.3.3
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.3.3 to 0.3.4
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.3.4 to 0.3.5
-
-### Dependencies
-
-* The following workspace dependencies were updated
-  * dependencies
-    * launchdarkly-cpp-common bumped from 0.3.5 to 0.3.6
+## [0.5.1](https://github.com/launchdarkly/cpp-sdks/compare/launchdarkly-cpp-internal-v0.5.0...launchdarkly-cpp-internal-v0.5.1) (2023-12-13)
 
 ### Dependencies