Fix a case where a change to a project in terraform can never apply when certain fields are modified.

Because the gitlab API actually expects at least on field out of a subset of fields in an update call (aside from `id`), if you only modify fields not in this subset, the Gitlab API will return a 400 complaining that one of the needed fields is missing.

One of these special fields is `name`. As this seems to be a safe field to assume always exists (we'll still defensively check if nil though), we pass it in always.

Author: Michael Chmielewski

internal/provider/resource_gitlab_project.go

@@ -1211,7 +1211,11 @@ func resourceGitlabProjectUpdate(ctx context.Context, d *schema.ResourceData, me
 	options := &gitlab.EditProjectOptions{}
 	transferOptions := &gitlab.TransferProjectOptions{}
 
-	if d.HasChange("name") {
+	// Always send the name field, to satisfy the requirement of having one
+	// of the project attributes listed below in the update call
+	// https://gitlab.com/gitlab-org/gitlab-foss/-/blob/master/lib/api/helpers/projects_helpers.rb#L120-188
+	// if d.HasChange("name") {
+	if d.Get("name").(string) != nil {
 		options.Name = gitlab.String(d.Get("name").(string))
 	}