Here is a quick example with the GitHub CLI, for more info refer to the docs. You can do this whenever you see we are missing one release. You need to call this multiple times to target different OTP releases.
gh api \
--method POST \
-H "Accept: application/vnd.github+json" \
-H "X-GitHub-Api-Version: 2022-11-28" \
/repos/grisp/grisp/dispatches \
-f "event_type=new-otp-release" \
-F "client_payload[otp]=28.4.1" \
-F "client_payload[unit]=false" \
-F "client_payload[integration]=true"