cert-manager: cert-exporter: Static SSH host keys

The *cert-exporter* script really only needs the SSH host key for Gitea,
so the dynamic host key fetch is overkill.  Since it frequently breaks
for various reasons, it's probably better to just have a static list of
trusted keys.

cert-manager/kustomization.yaml

@@ -26,8 +26,7 @@ secretGenerator:
   namespace: cert-manager
   files:
   - cert-exporter.pem
-  options:
-    disableNameSuffixHash: true
+  - ssh_known_hosts
 
 - name: acme-dns
   namespace: cert-manager