chore: Remove example as a requirement from new integration proposal (#2101)

Author: julian-risch

.github/ISSUE_TEMPLATE/new-integration-proposal.md

@@ -28,7 +28,6 @@ If the request is accepted, ensure the following checklist is complete before cl
 - [ ] A new label named like `integration:<your integration name>` has been added to the list of labels for this [repository](https://github.com/deepset-ai/haystack-core-integrations/labels)
 - [ ] The [labeler.yml](https://github.com/deepset-ai/haystack-core-integrations/blob/main/.github/labeler.yml) file has been updated
 - [ ] The package has been released on PyPI
-- [ ] An integration tile has been added to https://github.com/deepset-ai/haystack-integrations
+- [ ] An integration tile with a usage example has been added to https://github.com/deepset-ai/haystack-integrations
 - [ ] The integration has been listed in the [Inventory section](https://github.com/deepset-ai/haystack-core-integrations#inventory) of this repo README
-- [ ] There is an example available to demonstrate the feature
 - [ ] The feature was announced through social media