chore(github): update bug issue doc (vbenjs#3781)

project's monorepo is organized using pnpm workspace, it cannot be run with npm or yarn

Author: admin8756

.github/ISSUE_TEMPLATE/1-bug.md

@@ -36,4 +36,4 @@ Please describe the steps of the problem in detail to ensure that we can restore
 
 - Operating System:
 - Node version:
-- Package manager (npm/yarn/pnpm) and version:
+- pnpm version:

.github/ISSUE_TEMPLATE/3-bug-cn.md

@@ -25,4 +25,4 @@ assignees: ''
 
 - 操作系统:
 - Node 版本:
-- 包管理器 (npm/yarn/pnpm) 及其版本:
+- pnpm 版本: