Update the locations and languages fields for all upcoming events

[karasowles]

With the additional of location and language, most of the current events do not have the info for these in their files.

• Update the locations and languages fields for all upcoming events.
• Ensure that location and language are represented in the contributing guide.
• Update the issue template to include these fields

[karasowles]

Updated all current events to have locations: https://maintainermonth.github.com/schedule

[karasowles]

Added location and language to the contributing guide: https://github.com/github/maintainermonth/blob/main/CONTRIBUTING.md

[karasowles]

Updated the issue templates at https://github.com/github/maintainermonth/tree/main/.github/ISSUE_TEMPLATE
via #298