update README to reflect split from LALSuite
The README still claims:
Glue is part of the LALSuite Git repository.
Could the instructions be updated to reflect the new repo?
Maintenance will be performed on git.ligo.org, containers.ligo.org, and docs.ligo.org on Tuesday 23 April 2024 starting at approximately 9am PDT. It is expected to take around twenty minutes and there will be several periods of downtime throughout the maintenance. Please address any comments, concerns, or questions to the helpdesk.
The README still claims:
Glue is part of the LALSuite Git repository.
Could the instructions be updated to reflect the new repo?