[UP-4755] Add reference links to pull request template
[UP-4755] Add reference links to pull request template

GIP-RECIA/esup-uportal,Jasig/uPortal,ChristianMurphy/uPortal,groybal/uPortal,GIP-RECIA/esco-portail,phillips1021/uPortal,groybal/uPortal,ChristianMurphy/uPortal,jhelmer-unicon/uPortal,jonathanmtran/uPortal,jhelmer-unicon/uPortal,stalele/uPortal,GIP-RECIA/esco-portail,jhelmer-unicon/uPortal,jonathanmtran/uPortal,GIP-RECIA/esup-uportal,jonathanmtran/uPortal,mgillian/uPortal,jhelmer-unicon/uPortal,stalele/uPortal,apetro/uPortal,ChristianMurphy/uPortal,GIP-RECIA/esco-portail,bjagg/uPortal,jl1955/uPortal5,cousquer/uPortal,Jasig/uPortal,GIP-RECIA/esup-uportal,groybal/uPortal,Jasig/uPortal,Jasig/uPortal-start,apetro/uPortal,stalele/uPortal,phillips1021/uPortal,phillips1021/uPortal,bjagg/uPortal,phillips1021/uPortal,cousquer/uPortal,apetro/uPortal,stalele/uPortal,jl1955/uPortal5,apetro/uPortal,GIP-RECIA/esup-uportal,jl1955/uPortal5,cousquer/uPortal,phillips1021/uPortal,jl1955/uPortal5,stalele/uPortal,jhelmer-unicon/uPortal,Jasig/uPortal-start,jl1955/uPortal5,groybal/uPortal,bjagg/uPortal,GIP-RECIA/esup-uportal,mgillian/uPortal,apetro/uPortal,groybal/uPortal,mgillian/uPortal