config: regenerate upload config

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

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

Change-Id: I4696db7468c9c326c9771d80ea7301fbdf34c360
Reviewed-on: https://go-review.googlesource.com/c/telemetry/+/771400
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Madeline Kalil <mkalil@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

config/config.json

diff --git a/config/config.json b/config/config.json
index a5bb140..baf77b5 100644
--- a/config/config.json
+++ b/config/config.json
@@ -556,6 +556,7 @@
 				"v1.26.2",
 				"v1.26.3",
 				"v1.26.4",
+				"v1.26.5",
 				"v1.27.0",
 				"v1.27.1"
 			],