Use more generic github endpoint name

azure-pipelines.yml

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index ab4c896..7b331b9 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -6,7 +6,7 @@
   repositories:
     - repository: asottile
       type: github
-      endpoint: asottile-github
+      endpoint: github
       name: asottile/azure-pipeline-templates
       ref: refs/tags/v0.0.8