ignore: add version to bug template

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -49,3 +49,11 @@ body:
       placeholder: e.g., iTerm2, Ghostty, Alacritty, Windows Terminal
     validations:
       required: false
+
+  - type: input
+    id: opencode-version
+    attributes:
+      label: OpenCode version
+      description: What version of OpenCode are you using?
+    validations:
+      required: false