chore: Update actions.ts (#2227)

non-existant -> non-existent

packages/loot-core/src/server/budget/actions.ts

@@ -15,7 +15,7 @@ export async function getSheetValue(
 
 // We want to only allow the positive movement of money back and
 // forth. buffered should never be allowed to go into the negative,
-// and you shouldn't be allowed to pull non-existant money from
+// and you shouldn't be allowed to pull non-existent money from
 // leftover.
 function calcBufferedAmount(
   toBudget: number,