Update release_notes.txt regarding issues with demo's WAR file and java demo portal still being at older version (#2837)
Update release_notes.txt regarding issues with demo's WAR file and java demo portal still being at older version (#2837)

* Update release_notes.txt

* Update release_notes.txt
google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber,google/libphonenumber