CIP-1694 | Updates and semantics (#847)

* Update CIP-1694

- Replace "New Constitutional Committee" governance action by "Update Committee"
- Replace "Update to the Constitution" governance action by "New Constitution". This is how it is called on-chain when submitting this governance action and when querying the its tag. I also changed it for semantic reasons. 
- Replace "Proposal policy" by "Guardrails Script". This wording is mainly used broadly by everyone and is also the wording used in the Interim constitution Article VIII, Apendix 1, (Automated Checking ("Guardrails Script")).
- Update each parameters name tags as seen on chain. (conway era)
- Replace "Pre-defined Drep" name by "Pre-defined voting option" at 3 different placed in the CIP-1694 (Which got me in big trouble, but lets not go there. =P)

* Update PP security group for SPO