chore: Fix title underline lengths in fluent.runtime/CHANGELOG.rst

Author: eemeli

fluent.runtime/CHANGELOG.rst

@@ -2,7 +2,7 @@ Changelog
 =========
 
 fluent.runtime 0.4.0 (March 13, 2023)
------------------------------------
+-------------------------------------
 
 * Drop support for Python 2.7 and 3.5 & support for Python 3.6 through 3.9 ([#163](https://github.com/projectfluent/python-fluent/pull/163))
 * Add type hints ([#180](https://github.com/projectfluent/python-fluent/pull/180))
@@ -14,7 +14,7 @@ fluent.runtime 0.3.1 (May 20, 2020)
 * Updated package metadata.
 
 fluent.runtime 0.3 (October 23, 2019)
----------------------------------------
+-------------------------------------
 
 * Added ``fluent.runtime.FluentResource`` and
   ``fluent.runtime.FluentBundle.add_resource``.