config: regenerate upload config

This is an automated CL which updates the generated upload config.

[git-generate]
go generate ./internal/configgen

Change-Id: Iff237f044911a754aad9ee2608a6b3f0d6a5eebd
Reviewed-on: https://go-review.googlesource.com/c/telemetry/+/739880
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Hongxiang Jiang <hxjiang@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/config/config.json b/config/config.json
index a7a2db8..5314c95 100644
--- a/config/config.json
+++ b/config/config.json
@@ -570,6 +570,7 @@
 				"v0.53.3",
 				"v0.53.4",
 				"v0.53.5",
+				"v0.53.6",
 				"v0.54.0",
 				"v0.54.1",
 				"v0.54.2",