Fix broke/missing changelog links

- Add 2.1.16 changelog link
- Add 2.2.7 changelog link
- Fix wrong link for 2.2.6 changelog

Closes: openzfs/zfs#17036
Signed-off-by: Tony Hutter <hutter2@llnl.gov>

index.html

@@ -48,7 +48,8 @@
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.3">v2.2.3</a>
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.4">v2.2.4</a>
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.5">v2.2.5</a>
-			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.0">v2.2.6</a>
+			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.6">v2.2.6</a>
+			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.2.7">v2.2.7</a>
 		</td>
 		<td> <a href="https://openzfs.github.io/openzfs-docs/man/v2.2/index.html">2.2.7</a> </td>
 		<td> Dec 11 2024 </td>
@@ -77,6 +78,7 @@
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.1.13">v2.1.13</a>
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14">v2.1.14</a>
 			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.1.15">v2.1.15</a>
+			<a href="https://github.com/openzfs/zfs/releases/tag/zfs-2.1.16">v2.1.16</a>
 		</td>
 		<td> <a href="https://openzfs.github.io/openzfs-docs/man/v2.1/index.html">2.1.16</a> </td>
 		<td> Dec 05 2024 </td>