Creation of an blog post to announce the next report

[Ly0n]

For the next report we need a announcement blog post. This helps us to find more contributors to the database but also to the report. In this way, we can also agree on a common alignment for the report in advance. The announcement blog post on the first report can be found here: https://opensustain.tech/blog/impact_and_potential_of_open_source_on_climate_technology/