update github provider

tools/lockfile/main.tf

@@ -12,10 +12,19 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+terraform {
+  required_providers {
+    github = {
+      source  = "integrations/github"
+      version = "~> 5.0"
+    }
+  }
+}
+
 data "archive_file" "bundle" {}
 resource "azuread_user" "default" {}
 resource "azurerm_resource_group" "default" {}
-resource "github_branch" "default" {}
+resource "github_branch" "default" { provider = github }
 resource "google_service_account" "sa1" {}
 resource "google_service_account" "sa2" { provider = google-beta }
 resource "local_file" "default" {}