[6.0] cd5036cef Make the 6.0 branch use the 6.0-lts pkg-varnish-cache branch

[Martin Blix Grydeland]

commit cd5036ceff3fc6d37f57ecb33e37ac4181b56311
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Fri Nov 6 11:49:14 2020 +0100

    Make the 6.0 branch use the 6.0-lts pkg-varnish-cache branch

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 571b7703f..0b8da355f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,7 +12,7 @@ parameters:
     default: "HEAD"
   pkg-commit:
     type: string
-    default: ""
+    default: "6.0-lts"
   dist-url:
     type: string
     default: ""