Dispatcher reported they did not issue an alternate as required by a 5G NOTAM.

Narrative

Release did not have an alternate on it for 5G NOTAM. As per the company policy we are supposed to add an alternate for 5G NOTAMs at destination. I missed the NOTAM in review the flight release for release to crew. Crew called for a new release for fuel uplift. On pass off that morning which happened coincidentally near the time of departure; the oncoming dispatcher caught this. I ACARS the crew; crew called; and we agreed to amend the flight planned instead of a new release. I amended the flight release for an alternate of ZZZ1; sent weather; and sent NOTAMS. Flight launched and terminated without incident. This all happened before block out. I scanned through the NOTAMs and did not see the 5G NOTAM. The 5G NOTAM to Runway XXR was there. I had thought ZZZ2 was not a 5G NOTAM airport.First; better diligence on my part in checking and noticing 5G NOTAMs that will affect added alternates and fuel. Secondly; I have reviewed the Alternate Method of Compliance 5G alert again and will be sure to include ALTNs when needed. Third; can we have a monthly update on what is happening between the airlines; FAA; and our internal department. The more clear communication on updates to this we the better. Why are we continuing to added alternate for VFR weather at destination?