Fix post logs url

Author: mnasiadka

playbooks/base/post-logs.yaml

@@ -4,4 +4,4 @@
   roles:
     - generate-zuul-manifest
     - role: upload-logs
-      zuul_log_url: "http://localhost:8000"
+      zuul_log_url: "http://172.16.1.164:8000"

zuul.d/projects.yaml

@@ -7,6 +7,7 @@
 
 - project:
     name: stackhpc-zuul-config
+    default-branch: main
     check:
       jobs:
         - noop