Fixes description grammar in a few places (#19607)

* Fixes punctuation on clown box description

* Fixes grammar in a couple places

code/modules/clothing/head/jobs.dm

@@ -110,7 +110,7 @@
 //Mime
 /obj/item/clothing/head/beret
 	name = "beret"
-	desc = "A beret, an artists favorite headwear."
+	desc = "A beret, an artist's favorite headwear."
 	icon_state = "beret"
 	dog_fashion = /datum/dog_fashion/head/beret
 

code/modules/clothing/shoes/miscellaneous.dm

@@ -401,7 +401,7 @@
 
 /obj/item/clothing/shoes/ducky
 	name = "rubber ducky shoes"
-	desc = "These shoes are made for quacking, and thats just what they'll do."
+	desc = "These shoes are made for quacking, and that's just what they'll do."
 	icon_state = "ducky"
 	item_state = "ducky"
 

code/modules/food_and_drinks/food/foods/pasta.dm

@@ -49,7 +49,7 @@
 
 /obj/item/reagent_containers/food/snacks/meatballspaghetti
 	name = "spaghetti & meatballs"
-	desc = "Now thats a nice'a meatball!"
+	desc = "Now that's a nice'a meatball!"
 	icon = 'icons/obj/food/pasta.dmi'
 	icon_state = "meatballspaghetti"
 	trash = /obj/item/trash/plate