[docs] Adding 5.1 release date

Author: andrewnicols

data/versions.json

@@ -1,6 +1,23 @@
 {
     "$schema": "../static/schema/versions.json",
     "versions": [
+        {
+            "name": "5.1",
+            "releaseDate": "6 October 2025",
+            "generalEndDate": "5 October 2026",
+            "securityEndDate": "5 April 2027",
+            "isLTS": false,
+            "codeFreezeDate": "25 August 2025",
+            "releases": [
+                {
+                    "name": "5.1.0",
+                    "releaseDate": "6 October 2025",
+                    "version": 2025100600,
+                    "upgradePath": "https://docs.moodle.org/501/en/Upgrading",
+                    "releaseNoteUrl": false
+                }
+            ]
+        },
         {
             "name": "5.0",
             "releaseDate": "14 April 2025",
@@ -2362,4 +2379,4 @@
             "isLTS": false
         }
     ]
-}
+}

general/releases/5.1.md

@@ -0,0 +1,64 @@
+---
+title: Moodle 5.1
+tags:
+  - Release notes
+  - Moodle 5.1
+sidebar_position: -501
+moodleVersion: 5.1.0
+description: The release notes for Moodle version 5.1.0.
+---
+
+import { ReleaseNoteIntro } from '@site/src/components/ReleaseInformation';
+
+<ReleaseNoteIntro releaseName={frontMatter.moodleVersion} />
+
+If you are upgrading from a previous version, please see [Upgrading](https://docs.moodle.org/en/Upgrading) in the user docs.
+
+## Server requirements
+
+These are just the minimum supported versions. We recommend keeping all of your software and operating systems up-to-date.
+
+- Moodle upgrade: Moodle 4.2.3 or later.
+- PHP version: minimum PHP 8.2.0 *Note: minimum PHP version has increased since Moodle 4.5*. PHP 8.3.x and 8.4.x are supported too. See [PHP](../development/policies/php.md) for details.
+- PHP extension **sodium** is required. See [Environment - PHP extension sodium](https://docs.moodle.org/en/Environment_-_PHP_extension_sodium).
+- PHP setting **max_input_vars** must be >= 5000. For further details, see [Environment - max input vars](https://docs.moodle.org/en/Environment_-_max_input_vars).
+- PHP variants: Only 64-bit versions of PHP are supported.
+
+### Database requirements
+
+Moodle supports the following database servers. Again, version numbers are just the minimum supported version. We recommend running the latest stable version of any software.
+
+| Database | Minimum version | Recommended |
+| --- | --- | --- |
+| [PostgreSQL](http://www.postgresql.org/) | 14 (increased since Moodle 4.5) | Latest |
+| [MySQL](http://www.mysql.com/) | 8.4 (increased since Moodle 4.5) | Latest |
+| [MariaDB](https://mariadb.org/) | 10.11.0 (increased since Moodle 4.5) | Latest |
+| [Microsoft SQL Server](http://www.microsoft.com/en-us/server-cloud/products/sql-server/) | 2017 | Latest |
+
+Please note that Oracle Database is no longer supported from Moodle LMS 5.0.
+
+:::note Database prefixes
+
+Since Moodle 4.3, the maximum length for the database prefix (`$CFG->prefix`) is 10 characters. Installation or upgrade won't be possible with longer prefixes.
+
+:::
+
+## Client requirements
+
+### Browser support
+
+Moodle is compatible with any standards compliant web browser. We regularly test Moodle with the following browsers:
+
+Desktop:
+
+- Chrome
+- Firefox
+- Safari
+- Edge
+
+Mobile:
+
+- MobileSafari
+- Google Chrome
+
+For the best experience and optimum security, we recommend that you keep your browser up to date.