[core-workflow] 🍝 New keyword in bpo: `newcomer friendly`

🍝 copy-pasta from core-mentorship mailing list. There is now a “newcomer friendly” keyword in bpo. My hope is that going forward, we can tag issues that are suitable for first time contributors with this keyword. It would be great for experienced contributors already familiar with our workflow to not work on issues tagged with newcomer friendly and leave that to new contributors. I’ve added the keyword to Devguide’s Triaging section, with additional guideline of what can be tagged as newcomer friendly. Typically it should be straightforward, well-defined issue, and low-risk. https://devguide.python.org/triaging.html#keywords Thanks. ᐧ