Update plugin org.grails.grails-plugin to v6.1.1 (#984)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle.properties

@@ -1,6 +1,6 @@
 projectVersion=6.1.1-SNAPSHOT
 grailsVersion=6.1.0
-grailsGradlePluginVersion=6.1.0
+grailsGradlePluginVersion=6.1.1
 groovyVersion=3.0.11
 gorm.version=8.0.0
 vcsUrl=https://github.com/grails-plugins/grails-spring-security-core