add m82 release notes

Bug: skia:
Change-Id: I1f24f8c8e58d8d40947662fac70efe7a9fe4550e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/277461
Reviewed-by: Heather Miller <hcm@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Heather Miller <hcm@google.com>
1 file changed