add network updates to news

This MR introduces:

• add info about new networks to cloud news.

content/cloud/news/index.md

@@ -5,13 +5,22 @@ draft: false
 disableToc: true
 GeekdocHidden: true
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+
+**2022-03-14** New public networks added to OpenStack:
+
+* IPv4 group network: `public-cesnet-195-113-167-GROUP`
+* IPv4 personal network: `public-muni-147-251-115-PERSONAL`
+* IPv6 network: `public-muni-v6-432`
+
+Additional information is available on [Networking](/cloud/network/) page.
+
 **2022-03-07**
 1. OpenStack cloud security review and related improvements
 2. [Centos 8 cloud images are going to be deprecated in comming weeks](https://www.centos.org/centos-linux-eol/) in favor of Almalinux 8
 
 **2022-02-21** Openstack cloud internal Monasca monitoring services were replaced by Prometheus, Thanos & Alertmanager.
 
-**2021-12-13** 
+**2021-12-13**
 1. Coref cluster was handed over, it is not ready for use yet
 2. Automatic image rotation mechanism was added.