feat: only store cluster-issuers in core kustomization

Signed-off-by: Devin Buhl <devin@buhl.casa>

configure

@@ -51,7 +51,7 @@ main() {
         envsubst < "${PROJECT_DIR}/tmpl/cluster/cluster-secrets.sops.yaml" \
             > "${PROJECT_DIR}/cluster/config/cluster-secrets.sops.yaml"
         envsubst < "${PROJECT_DIR}/tmpl/cluster/cert-manager-secret.sops.yaml" \
-            > "${PROJECT_DIR}/cluster/core/cert-manager/secret.sops.yaml"
+            > "${PROJECT_DIR}/cluster/core/cluster-issuers/secret.sops.yaml"
         envsubst < "${PROJECT_DIR}/tmpl/cluster/cloudflare-ddns-secret.sops.yaml" \
             > "${PROJECT_DIR}/cluster/apps/networking/cloudflare-ddns/secret.sops.yaml"
         envsubst < "${PROJECT_DIR}/tmpl/cluster/external-dns-secret.sops.yaml" \