docs: announcement for 1.28.0, 1.27.2, and 1.26.3 (#395)

Closes #394

Signed-off-by: Gabriele Bartolini <[email protected]>
Signed-off-by: Marco Nenciarini <[email protected]>
Co-authored-by: Marco Nenciarini <[email protected]>
Signed-off-by: Gabriele Bartolini <[email protected]> af52f1a

Author: gbartolini

releases/cloudnative-pg-1-28.0-released/index.html

@@ -251,7 +251,7 @@ <h2 id="other-notable-enhancements">Other Notable Enhancements</h2>
 process begins.</li>
 </ul>
 <p>Dive into the full list of changes and fixes in the
-<a href="https://cloudnative-pg.io/documentation/release_notes/v1.28/">Release notes for CloudNativePG 1.28</a>.</p>
+<a href="https://cloudnative-pg.io/documentation/1.28/release_notes/v1.28/">Release notes for CloudNativePG 1.28</a>.</p>
 <h2 id="maintenance-releases-1272--1263">Maintenance Releases: 1.27.2 &amp; 1.26.3</h2>
 <p>In parallel with the 1.28 release, we have also shipped maintenance updates for
 previous stable series:</p>