Fix the links to slack channels (#10755)

Signed-off-by: Daniel Jiang <daniel.jiang@broadcom.com>

MAINTAINERS.md

@@ -20,7 +20,7 @@ All maintainers share collective responsibility for the entire Velero project. T
 ## Contacting the maintainers
 
 * **GitHub:** open an issue or pull request in the relevant [velero-io](https://github.com/velero-io) repository, or @mention a maintainer by their GitHub ID.
-* **Slack:** [#velero](https://kubernetes.slack.com/messages/velero) on the Kubernetes Slack.
+* **Slack:** [#velero-dev](https://kubernetes.slack.com/messages/velero-dev) on the Kubernetes Slack.
 * **Mailing list:** [Velero Google Group](https://groups.google.com/forum/#!forum/projectvelero).
 * **Security issues:** follow the private disclosure process in [SECURITY.md](https://github.com/velero-io/.github/blob/main/SECURITY.md) (cncf-velero-security@lists.cncf.io). Do not report vulnerabilities through public channels.
 

site/content/docs/main/supported-providers.md

@@ -17,7 +17,7 @@ Velero supports a variety of storage providers for different backup and snapshot
 | [VMware vSphere](https://www.vmware.com/ca/products/vsphere.html)              | 🚫                                                                                               | vSphere Volumes                                                                                    | [VMware vSphere](https://github.com/velero-io/velero-plugin-for-vsphere)                    | [vSphere Plugin Setup](https://github.com/velero-io/velero-plugin-for-vsphere#velero-plugin-for-vsphere-installation-and-configuration-details)    | 🚫 |
 {{< /table >}}
 
-Contact: [#Velero Slack](https://kubernetes.slack.com/messages/velero), [GitHub Issues](https://github.com/velero-io/velero/issues)
+Contact: [#Velero Slack](https://kubernetes.slack.com/messages/velero-dev), [GitHub Issues](https://github.com/velero-io/velero/issues)
 
 ## Provider plugins maintained by the Velero community
 {{< table caption="Community supported providers" >}}

site/content/docs/main/troubleshooting.md

@@ -3,7 +3,7 @@ title: "Troubleshooting"
 layout: docs
 ---
 
-These tips can help you troubleshoot known issues. If they don't help, you can [file an issue][4], or talk to us on the [#velero channel][25] on the Kubernetes Slack server.
+These tips can help you troubleshoot known issues. If they don't help, you can [file an issue][4], or talk to us on the [#velero-users channel][25] on the Kubernetes Slack server.
 
 ## Debug installation/ setup issues
 
@@ -280,5 +280,5 @@ See [Write Sparse files](restore-reference.md#write-sparse-files) for more detai
 [10]: locations.md
 [11]: /plugins
 [12]: https://kubernetes.io/docs/concepts/configuration/secret/#editing-a-secret
-[25]: https://kubernetes.slack.com/messages/velero
+[25]: https://kubernetes.slack.com/messages/velero-users
 [26]: contributions/minio.md

site/content/posts/2026-07-30-Velero-Joins-CNCF-Sandbox.md

@@ -59,7 +59,7 @@ Joining the CNCF Sandbox is the beginning of a new chapter for Velero. Here is w
 
 We welcome contributions of all kinds -- code, documentation, bug reports, feature requests, and feedback.
 
-- **Slack**: Join [#velero-users](https://kubernetes.slack.com/messages/velero) and [#velero-dev](https://kubernetes.slack.com/messages/velero-dev) on Kubernetes Slack
+- **Slack**: Join [#velero-users](https://kubernetes.slack.com/messages/velero-users) and [#velero-dev](https://kubernetes.slack.com/messages/velero-dev) on Kubernetes Slack
 - **GitHub**: [github.com/velero-io/velero](https://github.com/velero-io/velero)
 - **Community Meetings**: We hold bi-weekly community meetings alternating between US/Europe and US/Asia-friendly time zones. See the [community page](https://velero.io/community/) for details.
 - **LinkedIn**: Follow us at [Project Velero](https://www.linkedin.com/company/project-velero)