fix(docs): Rename variable iter to coll for consistency with documentation

Replaced variable name `iter` with `coll` in the code examples to align with the surrounding documentation and improve clarity.

Author: blank71

_overviews/collections-2.13/views.md

@@ -21,15 +21,15 @@ As an example of a non-strict transformer consider the following implementation
 {% tabs views_1 class=tabs-scala-version %}
 {% tab 'Scala 2' for=views_1 %}
 ```scala mdoc
-def lazyMap[T, U](iter: Iterable[T], f: T => U) = new Iterable[U] {
-  def iterator = iter.iterator.map(f)
+def lazyMap[T, U](coll: Iterable[T], f: T => U) = new Iterable[U] {
+  def iterator = coll.iterator.map(f)
 }
 ```
 {% endtab %}
 {% tab 'Scala 3' for=views_1 %}
 ```scala
-def lazyMap[T, U](iter: Iterable[T], f: T => U) = new Iterable[U]:
-  def iterator = iter.iterator.map(f)
+def lazyMap[T, U](coll: Iterable[T], f: T => U) = new Iterable[U]:
+  def iterator = coll.iterator.map(f)
 ```
 {% endtab %}
 {% endtabs %}