Update allente sites.

Signed-off-by: Toha <tohenk@yahoo.com>

sites/allente.se/readme.md

@@ -0,0 +1,21 @@
+# allente.se
+
+https://www.allente.se/tv-guide/
+
+### Download the guide
+
+```sh
+npm run grab --- --sites=allente.se
+```
+
+### Update channel list
+
+```sh
+npm run channels:parse --- --config=./sites/allente.se/allente.se.config.js --output=./sites/allente.se/allente.se_se.channels.xml
+```
+
+### Test
+
+```sh
+npm test --- allente.se
+```