docs: release notes for 2.3.0 (#426)

Author: mefellows

website/docs/docs/on-premises/releases/2.3.0.md

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+---
+title: 2.3.0
+---
+
+## Release date
+
+October 21, 2025
+
+## Features
+
+### User Interface enhanced.
+- We improved the dialog text in delete modals when you remove pacts and integrations.
+- The current user is now highlighted in the user list for easier identification.
+- Improved query parameter formatting on the contract details page now displays values exactly as they are sent over the network.
+- Now you can download contracts as attachments directly from the contract details page.
+
+### Roles and seat types updated.
+- To align with our cloud offering, we have updated the following role and permission settings:
+  - We renamed the **Viewer** role to **Read-Only**, without making any changes to permissions.
+  - We renamed the **Guest** role to **Viewer** and added the following read-only permissions:
+    - `user:read:*`
+    - `team:read:*`
+- We introduced a new No Access role with no permissions.
+
+### New onboarding tutorial.
+- We added an in-app tutorial to help new users learn the basics of contract testing and complete their first verified contract.
+
+### Bi-Directional Contract Testing (BDCT) improved.
+- We added support for [patterned fields](https://spec.openapis.org/oas/v3.1.0#patterned-fields-0), such as `4XX` or `5XX` status codes, in BDCT workflows.
+- Now we support nested `discriminator.mapping` to improve schema compatibility in BDCT workflows.
+
+## Fixes
+
+### General fixes
+- We fixed an issue where the UI prevented some users with the correct permissions from deleting secrets.
+- We fixed an issue in Bi-Directional Contract Testing (BDCT) to display compatibility check results when a method or path is missing in an OpenAPI document.
+- We fixed an issue where SAML logins redirected over HTTP instead of HTTPS. The correct protocol is now maintained throughout the SAML workflow.
+- We fixed an issue that prevented `allOf` schemas from being interpreted correctly.
+- We fixed an issue that prevented testing webhooks without a team.
+- We fixed an issue where some users were unable to filter applications in the Teams or Favorites views.

website/notices/2025-10-21-on-premises-2.3.0.md

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+---
+slug: 2025-10-21-on-premises-2.3.0
+title: On-premises release v2.3.0
+tags: [on-premises, release]
+---
+
+A new PactFlow on-premises release (2.3.0) is now available. See details here: [2.3.0](/docs/on-premises/releases/2.3.0).

website/sidebars.js

@@ -523,6 +523,7 @@ module.exports = {
       label: "Releases",
       items: [
         //on-prem-release-placeholder
+        'docs/on-premises/releases/2.3.0',
         'docs/on-premises/releases/2.2.0',
         'docs/on-premises/releases/2.1.1',
         'docs/on-premises/releases/2.1.0',