Bump golangci version to v1.38.0 (#17154)

* Update golangci to v1.38.0

Co-authored-by: Claudio Costa <cstcld91@gmail.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/post.go

@@ -585,8 +585,7 @@ func (a *App) UpdatePost(post *model.Post, safeUpdate bool) (*model.Post, *model
 		return nil, model.NewAppError("UpdatePost", "api.post.update_post.can_not_update_post_in_deleted.error", nil, "", http.StatusBadRequest)
 	}
 
-	newPost := &model.Post{}
-	newPost = oldPost.Clone()
+	newPost := oldPost.Clone()
 
 	if newPost.Message != post.Message {
 		newPost.Message = post.Message