Update up-or-down.mdx (#1202)

remove 4 charms

docs/variant-specific/up-or-down.mdx

@@ -14,7 +14,9 @@ These conventions apply to the "Up or Down" variants.
 ### Disabled Conventions
 
 - The _2 Saves_ convention is turned off. (2's are not valuable in this variant.)
+  - The 2 of a dark suit should be saved like the 3 or 4 of the same suit.
 - The _3 Bluffs_ convention is turned off. (3's are not valuable in this variant.) Instead, 3s can be used for _Double Bluffs_.
+- The _4 Charm_ convention is turned off.
 - The _5 Stall_, _5's Chop Move_, and _5 Pull_ conventions are turned off.
 
 ### 1 Color Ejection (1CE)
@@ -23,12 +25,6 @@ These conventions apply to the "Up or Down" variants.
 - _1 Color Ejection_ works in the same way that _5 Color Ejection_ does (e.g. players use the "two-or-more blind-plays" rule).
 - Before a _1 Color Ejection_ can be performed, the suit direction must be established. For example, if no cards are played on the stacks, then a _Play Clue_ touching a 1 would just look like a normal _Play Clue_.
 
-### 2 Charm
-
-- Similar to _4 Charm_, it is also possible to perform a _2 Charm_ in an _Up or Down_ variant.
-- _2 Charms_ works in the same way that _4 Charms do_ (e.g. players use the "three-or-more blind-plays" rule).
-- Before a _2 Charm_ can be performed, the suit direction must be established. For example, if no cards are played on the stacks, then a _Play Clue_ to a 2 would just indicate a normal _Finesse_.
-
 ### The U-Turn Finesse
 
 - Normally, when a clued card is going to play and then someone on the team clues that card **again**, this is usually one of two different things: