Add 1.14 to the supported releases table

[wallrj]

Preview: https://deploy-preview-1414--cert-manager-website.netlify.app/docs/releases/

I forgot to update this in #1400.

• 1400

• https://github.com/cert-manager/cert-manager/issues/6710
• https://github.com/cert-manager/cert-manager/issues/6591

[netlify[bot]]

✅ Deploy Preview for cert-manager-website ready!

Name	Link
🔨 Latest commit	770ca4ce29a8d1fb8364347a08c1e520324bbe54
🔍 Latest deploy log	https://app.netlify.com/sites/cert-manager-website/deploys/65be51a80269280008134a99
😎 Deploy Preview	https://deploy-preview-1414--cert-manager-website.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[jetstack-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: SgtCoDFish

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/cert-manager/website/blob/master/OWNERS)~~ [SgtCoDFish] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment