Correct Jinja Syntax for etcd-unsupported-arch (#6919)

`-%` causes `etcd-unsupported-arch: arm64` to print on COL 1 instead of
COL 6.

Signed-off-by: anthr76 <hello@anthonyrabbito.com>
(cherry picked from commit edfa3e9b14)

roles/kubernetes/master/templates/kubeadm-config.v1beta2.yaml.j2

@@ -64,7 +64,7 @@ etcd:
 {% for key, value in etcd_extra_vars.items() %}
       {{ key }}: "{{ value }}"
 {% endfor %}
-{% if host_architecture != "amd64" -%}
+{% if host_architecture != "amd64" %}
       etcd-unsupported-arch: {{host_architecture}}
 {% endif %}
     serverCertSANs: