docs: Add kube_deployment_spec_topology_spread_constraints metric documentation

Author: SoumyaRaikwar

docs/metrics/workload/deployment-metrics.md

@@ -14,6 +14,7 @@
 | kube_deployment_spec_paused                                 | Gauge       | Whether the deployment is paused and will not be processed by the deployment controller.                                               | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt;                                                                                          | STABLE       |
 | kube_deployment_spec_strategy_rollingupdate_max_unavailable | Gauge       | Maximum number of unavailable replicas during a rolling update of a deployment.                                                        | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt;                                                                                          | STABLE       |
 | kube_deployment_spec_strategy_rollingupdate_max_surge       | Gauge       | Maximum number of replicas that can be scheduled above the desired number of replicas during a rolling update of a deployment.        | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt;                                                                                          | STABLE       |
+| kube_deployment_spec_topology_spread_constraint             | Gauge       | Explicit details of each topology spread constraint in the deployment's pod template                                                   | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt; <br> `topology_key`=&lt;topology-key&gt; <br> `max_skew`=&lt;max-skew-value&gt; <br> `when_unsatisfiable`=&lt;DoNotSchedule\|ScheduleAnyway&gt; <br> `min_domains`=&lt;min-domains-value&gt; <br> `label_selector`=&lt;label-selector-string&gt; | ALPHA        |
 | kube_deployment_metadata_generation                         | Gauge       | Sequence number representing a specific generation of the desired state.                                                               | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt;                                                                                          | STABLE       |
 | kube_deployment_labels                                      | Gauge       | Kubernetes labels converted to Prometheus labels controlled via [--metric-labels-allowlist](../../developer/cli-arguments.md)           | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt; <br> `label_DEPLOYMENT_LABEL`=&lt;DEPLOYMENT_LABEL&gt;                                   | STABLE       |
 | kube_deployment_created                                     | Gauge       | Unix creation timestamp                                                                                                                 | `deployment`=&lt;deployment-name&gt; <br> `namespace`=&lt;deployment-namespace&gt;                                                                                          | STABLE       |