Update release-changelog.md
Update release-changelog.md

Added bugfix and new features release notes for 1.13
a-gogo/agogo,liimaorg/liima,liimaorg/liima,a-gogo/agogo,a-gogo/agogo,liimaorg/liima,a-gogo/agogo,liimaorg/liima,liimaorg/liima,liimaorg/liima,a-gogo/agogo,a-gogo/agogo,liimaorg/liima,liimaorg/liima,a-gogo/agogo