I am considering picking up the Shillelagh cantrip as part of my book of shadows pact boon as a level 3 Warlock.
The spell description states that I get to use my spell casting modifier (Cha + 3) instead of Strength for attacks. Does that mean I still get to add my proficiency bonus (+2) to the attack since I am proficient with my staff?
The wording from the PHB is below
The wood of a club or quarterstaff you are holding is imbued with nature's power. For the duration, you can use your spellcasting ability instead of Strength for the attack and damage rolls of melee attacks using that weapon, and the weapon's damage die becomes a d8. The weapon also becomes magical, if it isn't already. The spell ends if you cast it again or if you let go of the weapon.