Merge pull request #429 from ousttrue/update_bug_report_template

Remove multi byte character from English template.

.github/ISSUE_TEMPLATE/------bug-report-ja--.md

@@ -33,6 +33,7 @@ assignees: ''
 **環境情報**
 
  - OS: [e.g. `Windows 10`]
+ - Unity version: [e.g. `Unity-2018.4`]
  - UniVRM version: [e.g. `0.52.0`]
 
 **追加の状況・背景**

.github/ISSUE_TEMPLATE/bug-report-------en--.md

@@ -1,5 +1,5 @@
 ---
-name: Bug report (バグ報告(en))
+name: Bug report
 about: Create a report to help us improve
 title: ''
 labels: ''
@@ -33,6 +33,7 @@ If applicable, add screenshots to help explain your problem.
 **Environments (please complete the following information):**
 
  - OS: [e.g. `Windows 10`]
+ - Unity version: [e.g. `Unity-2018.4`]
  - UniVRM version: [e.g. `0.52.0`]
 
 **Additional context**