Fixing broken link

This MR introduces:

Fixed link on network section

Why:

User reported not functioning link https://rt.cesnet.cz/rt/Ticket/Display.html?id=1019168

content/cloud/quick-start/index.md

@@ -148,7 +148,7 @@ For details, refer to [the official documentation](https://docs.openstack.org/ho
 
       * For personal project select personal-project-network-subnet from network 78-128-250-pers-proj-net
         ![](images/instance_launch_network-user.png)
-      * For group project select group-project-network-subnet from network group-project-network (check if [Router gateway](//network#associate-floating-ip") is set)
+      * For group project select group-project-network-subnet from network group-project-network (check if [Router gateway](/cloud/network/#associate-floating-ip) is set)
         ![](images/instance_launch_network-group.png)
 6. Key pair
       * **If public key was imported already**, add existing key to the instance and continue using button **Next**
@@ -218,7 +218,7 @@ For details, refer to [the official documentation](https://docs.openstack.org/ho
 {{< hint danger >}}
 **WARNING**
 If you have [GROUP](/cloud/register/#group-project) project, you need to configure
-Router gateway for your network. [Here](cloud/network/#setup-router-gateway-required-for-group-projects) you can find the manual.
+Router gateway for your network. [Here](/cloud/network/#setup-router-gateway-required-for-group-projects) you can find the manual.
 {{</hint>}}