Update RELEASE_NOTE_DRAFT.md for 8.0.0-M2 release.
Update RELEASE_NOTE_DRAFT.md for 8.0.0-M2 release.

Signed-off-by: Hiroshi Ito <9d7579b05cdc5c9047ae1d430fcf35b933b00ab3@gs.com>

g-votte/eclipse-collections,bhav0904/eclipse-collections,bhav0904/eclipse-collections,g-votte/eclipse-collections,bhav0904/eclipse-collections