[release] ChirpStack Gateway OS v3.6

[brocaar]

v3.6.0

Updates

• ChirpStack Application Server to v3.17.7
• ChirpStack Gateway Bridge to v3.14.2
• ChirpStack Network Server to v3.16.3

Note: The ChirpStack Gateway Bridge version included is compatible with ChirpStack v4 which will soon be released.