Update bug-report.yml (#2532)

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -5,6 +5,16 @@ title: "(short issue description)"
 labels: [bug, needs-triage]
 assignees: []
 body:
+  - type: checkboxes
+    id: ack
+    attributes:
+      label: Acknowledgements
+      options:
+        - label: I have [searched](https://github.com/aws/aws-sdk/issues?q=is%3Aissue) for past (open or closed) instances of this issue
+          required: true
+        - label: **I have verified all of my SDK modules are up-to-date** (you can perform a bulk update with `go get -u github.com/aws/aws-sdk-go-v2/...`)
+          required: true
+
   - type: textarea
     id: description
     attributes: