docs: update calendar, add news item, and link releases notes for 20.1.0

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5234>

docs/index.html

@@ -16,6 +16,8 @@
 
 <h1>News</h1>
 
+<h2>May 27, 2020</h2>
+<p><a href="relnotes/20.1.0.html">Mesa 20.1.0</a> is released. This is a new development release. See the release notes for more information about this release.</p>
 <h2>May 14, 2020</h2>
 <p><a href="relnotes/20.0.7.html">Mesa 20.0.7</a> is released. This is a bug fix release.</p>
 <h2>April 29, 2020</h2>

docs/release-calendar.html

@@ -66,11 +66,53 @@ if you'd like to nominate a patch in the next stable release.
 <td>Last planned release of the 20.0 series</td>
 </tr>
 <tr>
-<td rowspan="1">20.1</td>
-<td>2020-05-27</td>
-<td>20.1.0-rc5</td>
+<td rowspan="8">20.1</td>
+<td>2020-06-10</td>
+<td>20.1.1</td>
 <td>Eric Engestrom</td>
-<td>or 20.1.0 final</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-06-24</td>
+<td>20.1.2</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-07-08</td>
+<td>20.1.3</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-07-22</td>
+<td>20.1.4</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-08-05</td>
+<td>20.1.5</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-08-19</td>
+<td>20.1.6</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-09-02</td>
+<td>20.1.7</td>
+<td>Eric Engestrom</td>
+<td></td>
+</tr>
+<tr>
+<td>2020-09-16</td>
+<td>20.1.8</td>
+<td>Eric Engestrom</td>
+<td>Last planned release of the 20.1 series</td>
 </tr>
 </table>
 

docs/relnotes.html

@@ -21,6 +21,7 @@ The release notes summarize what's new or changed in each Mesa release.
 </p>
 
 <ul>
+<li><a href="relnotes/20.1.0.html">20.1.0 release notes</a></li>
 <li><a href="relnotes/20.0.7.html">20.0.7 release notes</a></li>
 <li><a href="relnotes/20.0.6.html">20.0.6 release notes</a></li>
 <li><a href="relnotes/20.0.5.html">20.0.5 release notes</a></li>