Publishing does not update "displayName" of plugin

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1

I publised my first gradle plugin with displayName = ‘Testing publising of plugin’

see

    plugins {
        id 'com.gradle.plugin-publish' version '0.9.7' 
    }

    version = '0.1-alpha'

    pluginBundle {
        website = 'https://github.com/x/y'
        vcsUrl  = 'https://github.com/x/y/todo.git'
        description = 'My first testing plugin'
        tags = ['testing', 'git']


        plugins {
            gradleGitManifestPlugin {
                id = 'org.git.manifest'
                displayName = 'Testing publising of plugin'
            }
        }
    }

I deleted that one and after next publishing the displaName is still the same although I changed it - see

plugins {
    id 'com.gradle.plugin-publish' version '0.9.7' 
}

version = '0.2-alpha'
group = 'com.github.jkonecny75'

pluginBundle {
    website = 'https://github.com/x/y'
    vcsUrl  = 'https://github.com/x/y/todo.git'
    description = 'Gradle alternative to Android repo tool (multi source GIT repositories)'
    tags = ['git']


    plugins {
        gradleGitManifestPlugin {
            id = 'org.git.manifest'
            displayName = 'GGM - Gradle Git Manifest plugin'
        }
    }
}