RELEASE_NOTES: Fix broken links
RELEASE_NOTES: Fix broken links

The links were pointing to https://github.com/lefthandedgoat/canopy/issue/xxx
instead of https://github.com/lefthandedgoat/canopy/issues/xxx
lefthandedgoat/canopy,skalinets/canopy,blair55/canopy,lefthandedgoat/canopy,JeremyBellows/canopy,JeremyBellows/canopy,soerennielsen/canopy,lefthandedgoat/canopy,JeremyBellows/canopy,soerennielsen/canopy,skalinets/canopy,blair55/canopy,lefthandedgoat/canopy,lefthandedgoat/canopy,blair55/canopy,skalinets/canopy,skalinets/canopy,skalinets/canopy,blair55/canopy,JeremyBellows/canopy,soerennielsen/canopy,soerennielsen/canopy,JeremyBellows/canopy