Initial draft of a changelog for the tech docs

- design system formatted table in partial
- included partial in the home page

source/index.html.md.erb

@@ -23,4 +23,6 @@ You can [read further documentation about how GOV.UK One Login works](/how-gov-u
 
 Contact us if you have any questions on our [#govuk-one-login Slack channel](https://ukgovernmentdigital.slack.com/archives/C02AQUJ6WTC).
 
+<%= partial "partials/changelog" %>
+
 <%= partial "partials/links" %>

source/partials/_changelog.erb

@@ -0,0 +1,41 @@
+<!-- Change log -->
+<p>These are the most recent changes to this documentation</p>
+
+
+<h2 class="govuk-heading-m">Documentation updates</h2>
+<table class="govuk-table">
+        <thead class="govuk-table__head">
+            <tr>
+                <th scope="col" class="govuk-table__header govuk-!-width-one-quarter">Publication date</th>
+                <th scope="col" class="govuk-table__header govuk-!-width-three-quarters">Update</th>
+            </tr>
+        </thead>
+
+    <tbody class="govuk-table__body">
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Mar 25 2024</th>
+            <td class="govuk-table__cell">Remove references to the refresh token and <code>offline-access</code> to simplify integration and  the <a href="/how-gov-uk-one-login-works/#understand-the-technical-flow-gov-uk-one-login-uses">technical flow</a></td>
+        </tr>
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Feb 14 2024</th>
+            <td class="govuk-table__cell">New content "<a href="/before-integrating/choose-your-sector-identifier/">Choose your sector identifier</a>" to explain the use of the Sector identifier with a worked example that shows the effect of choosing different Sector identifiers</td>
+        </tr>
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Dec 22 2023</th>
+            <td class="govuk-table__cell">Updated guidance on making a request to the <code>/authorize</code> endpoint</td>
+        </tr>
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Dec 21 2023</th>
+            <td class="govuk-table__cell">New content "<a href="/integrate-with-integration-environment/authenticate-your-user/#secure-your-authorisation-request-parameters-with-jwt">Secure your authorisation request parameters with JWT</a>" using a JWT-secured OAuth 2.0 authorisation request (JAR) to improve the security of your integration and protect against tampering</a></td>
+        </tr>
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Oct 31 2023</th>
+            <td class="govuk-table__cell">New guidance "<a href="/before-integrating">Before you integrate with GOV.UK One Login</a>" to help plan your integration with GOV.UK One Login</td>
+        </tr>
+        <tr class="govuk-table__row">
+            <th class="govuk-table__header">Aug 31 2023</th>
+            <td class="govuk-table__cell">Add warning to code samples that contain formatting to improve readability and warn develpers to be remove whitespace in actual code</td>
+        </tr>
+
+    </tbody>
+</table>