Bump to 3.6.1

[dvojtise]

Description

Increase version to 3.6.1

Contribution to issues

Contribute to https://github.com/eclipse/gemoc-studio/issues/285

Companion Pull Requests

• https://github.com/eclipse/gemoc-studio/pull/292
• https://github.com/eclipse/gemoc-studio-modeldebugging/pull/230
• https://github.com/eclipse/gemoc-studio-execution-ale/pull/60
• https://github.com/eclipse/gemoc-studio-execution-java/pull/31
• https://github.com/eclipse/gemoc-studio-execution-moccml/pull/75
• https://github.com/eclipse/gemoc-studio-moccml/pull/27
• https://github.com/eclipse/gemoc-studio-commons/pull/3