repo: add build type to Gitea issue template

.gitea/ISSUE_TEMPLATE/bug.yaml

@@ -2,10 +2,19 @@ name: Bug Report
 about: File a bug report
 title: "[BUG]: "
 body:
+  - type: dropdown
+    id: build_type
+    attributes:
+      label: "Build type (`docker-finance build`)"
+      options:
+        - default
+        - slim
+        - tiny
+        - micro
   - type: dropdown
     id: version
     attributes:
-      label: "Version or master (branch)"
+      label: "Release version or master (branch)"
       options:
         - master (branch)
         - v1.0.0-beta