Rename label in discussion from "meeting memo" to "meetingmemo"

[himorin]

remove white space to deal with name restriction of template for discussion

• rename label
• adjust "meetingmemo" template for discussion, to align with recent operation
• @kidayasuo should we mention about these filtering using labels in README?

[kidayasuo]

Thank you, @himorin. Explaining the labels somewhere sounds like a good idea, but I’m not sure the README is the best place. For someone new filing an issue or two, reading through the README just to attach the right labels might be too much. The documentation would mainly be for internal reference.

[himorin]

renamed. and now discussion template is adopted to create new discussion topic.

reading through the README just to attach the right labels might be too much

ah, actually, I imagined placing a link like discussions filtered with meetingnotes to check issues/discussions in certain category, but not asking someone to add labels for every new issues/discussions.