build.gradle: installGitHooks: add description and group

So it shows up properly in gradle tasks

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

build.gradle

@@ -440,8 +440,9 @@ task ktlintFormat(type: JavaExec, group: "formatting") {
     args "-F", "src/**/*.kt"
 }
 
-task installGitHooks(type: Copy) {
-    from('scripts/hooks') {
+task installGitHooks(type: Copy, group: "development") {
+    description = "Install git hooks"
+    from("${project.rootDir}/scripts/hooks") {
         include '*'
     }
     into '.git/hooks'