supervision-0.14.0 release data + time off

[SkalskiP]

Hi all 👋🏻

I wanted to give you two pieces of information:

• We plan to release supervision-0.14.0 on Wednesday, Aug 30th, 2023.
• I will be on holiday between Sep 8th and Sep 18th, 2023. @hardikdava and @onuralpszr, We need to think about the tasks you could work on when I am out.