feat: Add runtimeClassName value to crossplane helm chart docs

Signed-off-by: adrienfuss <[email protected]>

Author: adrienfuss

content/master/software/install.md

@@ -173,6 +173,7 @@ Apply customizations with the command line or with a Helm _values_ file.
 | `resourcesRBACManager.requests.cpu` | CPU resource requests for the RBAC Manager pod. | `"100m"` |
 | `resourcesRBACManager.requests.memory` | Memory resource requests for the RBAC Manager pod. | `"256Mi"` |
 | `revisionHistoryLimit` | The number of Crossplane ReplicaSets to retain. | `nil` |
+| `runtimeClassName` | The runtimeClassName name to apply to the Crossplane and RBAC Manager pods. | `""` |
 | `securityContextCrossplane.allowPrivilegeEscalation` | Enable `allowPrivilegeEscalation` for the Crossplane pod. | `false` |
 | `securityContextCrossplane.readOnlyRootFilesystem` | Set the Crossplane pod root file system as read-only. | `true` |
 | `securityContextCrossplane.runAsGroup` | The group ID used by the Crossplane pod. | `65532` |