fix: common changelog (#1245)

Author: robertlaurin

common/CHANGELOG.md

@@ -1,9 +1,8 @@
-### Unreleased
-
-* FIXED: Check that a variable is a string before truncating
+# Release History: opentelemetry-common
 
 ### v0.19.4 / 2022-05-08
 
+* FIXED: Check that a variable is a string before truncating
 * FIXED: Attribute length limit. only truncate strings and strings in arrays
 
 ### v0.19.3 / 2021-12-01