docs: fix markdown lint spacing

Author: yasicar

docs/metrics/workload/statefulset-metrics.md

@@ -18,4 +18,3 @@
 | kube_statefulset_status_current_revision                | Gauge       |                                                                                                                                         | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `revision`=&lt;statefulset-current-revision&gt;                                                                          | STABLE       |
 | kube_statefulset_status_update_revision                 | Gauge       |                                                                                                                                         | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt; <br> `revision`=&lt;statefulset-update-revision&gt;                                                                           | STABLE       |
 | kube_statefulset_deletion_timestamp                     | Gauge       | Unix deletion timestamp                                                                                                                 | `statefulset`=&lt;statefulset-name&gt; <br> `namespace`=&lt;statefulset-namespace&gt;                                                                                                                               | STABLE       |
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