Create Contribution Events Initiative mentoring meeting agenda issue template

Started sketching out a simple agenda in the summary.

Slight wording tweak. I think this is good enough for now as it will evolve as we use it.

Just need to make an issue template from this.

Add link to agenda.

Template is here:

#3338765: Contribution Event Initiative mentoring meetings (template) - DD MM YYYY →

and was used for the next meeting:

#3338767: Contribution Event Initiative mentoring meetings (review) - 9 February 2023 →

I wasn't available last weekend or the last few days, so am tagging this with ContributionWeekend2023 for my contribution work today.

Automatically closed - issue fixed for 2 weeks with no activity.