docs: Add correlation-id header, remove EOL section

website/content/docs/release-notes/v0_16_0.mdx

@@ -79,6 +79,20 @@ description: |-
     </td>
   </tr>
 
+  <tr>
+    <td style={{verticalAlign: 'middle'}}>
+      X-Correlation-ID HTTP header
+    </td>
+    <td style={{verticalAlign: 'middle'}}>
+      GA
+    </td>
+    <td style={{verticalAlign: 'middle'}}>
+      A new HTTP header was added to identify a transaction over a series of requests and responses. You can use the X-Correlation-ID header to correlate events between external systems and products. The initial release of the X-Correlation-ID header supports correlating events between Boundary and Vault.
+      <br /><br />
+      Learn more:&nbsp;<a href="/boundary/docs/api-clients/api#http-headers">HTTP headers</a>.
+    </td>
+  </tr>
+
 
   </tbody>
 </table>
@@ -125,25 +139,4 @@ description: |-
   </tr>
 
   </tbody>
-</table>
-
-## Feature deprecations and EOL
-
-<table>
-  <thead>
-    <tr>
-      <th style={{verticalAlign: 'middle'}}>EOL</th>
-      <th style={{verticalAlign: 'middle'}}>Description</th>
-    </tr>
-  </thead>
-  <tbody>
-
-  <tr>
-    <td style={{verticalAlign: 'middle'}}>
-   </td>
-    <td style={{verticalAlign: 'middle'}}>
-    </td>
-  </tr>
-
-  </tbody>
-</table>
+</table>