Fix cherrypick demo (#3287)

Cherrypick selections are now cleared after pasting (#3240), so the demo
needs a tiny change to reflect that.

- **PR Description**
The cherry pick demo is failing after the changes in #3240. This is just
a small update to that demo to reflect the new (and more convenient)
behavior from #3240.

- **Please check if the PR fulfills these requirements**

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [ ] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [ ] Docs (specifically `docs/Config.md`) have been updated if
necessary
* [x] You've read through your own file changes for silly mistakes etc

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pkg/integration/tests/demo/cherry_pick.go

@@ -81,11 +81,6 @@ var CherryPick = NewIntegrationTest(NewIntegrationTestArgs{
 				Contains("Integrate support for markdown in user posts"),
 				Contains("Fix bug in timezone conversion."),
 			).
-			Tap(func() {
-				// we need to manually exit out of cherry pick mode
-				t.Views().Information().Content(Contains("2 commits copied"))
-			}).
-			PressEscape().
 			Tap(func() {
 				t.Views().Information().Content(DoesNotContain("commits copied"))
 			})