Link c++ tips of the week as best practices for better discoverability. Extend deprecated section with recommendation to use recently published ABSL_DEPRECATE_AND_INLINE macro. No-Try: True Bug: None Change-Id: I3336e5929ae31542ff12ef6b1dfd9c272b9c480a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/347743 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42100}