doc(tasty-reflect): revert QuoteContext -> Context

Author: robstoll

docs/docs/reference/metaprogramming/tasty-reflect.md

@@ -124,9 +124,9 @@ of type List[Symbol] if we want to collect symbols). The code below, for
 example, collects the pattern variables of a tree.
 
 ```scala
-def collectPatternVariables(tree: Tree)(implicit qctx: QuoteContext): List[Symbol] = {
+def collectPatternVariables(tree: Tree)(implicit ctx: Context): List[Symbol] = {
   val acc = new TreeAccumulator[List[Symbol]] {
-    def apply(syms: List[Symbol], tree: Tree)(implicit qctx: QuoteContext) = tree match {
+    def apply(syms: List[Symbol], tree: Tree)(implicit ctx: Context) = tree match {
       case Bind(_, body) => apply(tree.symbol :: syms, body)
       case _ => foldOver(syms, tree)
     }