[IGSMAIL-8474] IGS technical report 2023 is available

[Rolf Dach]

Dear colleagues,

It is a pleasure to inform you that the IGS technical report 2023 is 
available on the IGS server 
(https://files.igs.org/pub/resource/technical_reports/2023_techreport.pdf).

It became once more a comprehensive overview on the activities within 
the IGS. I want to take the opportunity to thank all people and groups 
that have contributed to the report (and hope that the other IGS core 
components will join again next year).

The report for 2023 has registered with a DOI and ISBN number (see the 
related impress page). In this way the reports are better embedded in 
the system of scientific literature.

Best regards from the editor team

Rolf and Elmar