chore: address PR review feedback on issue and PR templates

- Remove V2/V3 SDK version field from all issue templates
- Update version examples to 3.2.0b1 (SDK) and 3.0.3 (Server)
- Add checklist section to pull request template

Signed-off-by: cxhello <caixiaohuichn@gmail.com>

Author: cxhello

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,10 +8,9 @@ assignees: ''
 
 ### Environment
 
-- **SDK Version**: (e.g., V2 / V3)
-- **SDK Package Version**: (e.g., 2.0.5)
+- **SDK Package Version**: (e.g., 3.2.0b1)
 - **Python Version**: (e.g., 3.10 / 3.12 / 3.13)
-- **Nacos Server Version**: (e.g., 2.4.0)
+- **Nacos Server Version**: (e.g., 3.0.3)
 - **OS**: (e.g., Ubuntu 22.04 / macOS 15 / Windows 11)
 
 ### Describe the Bug

.github/ISSUE_TEMPLATE/feature_request.md

@@ -6,12 +6,6 @@ labels: enhancement
 assignees: ''
 ---
 
-### SDK Version
-
-- [ ] V2
-- [ ] V3
-- [ ] Both
-
 ### Description
 
 A clear and concise description of the feature you'd like.

.github/ISSUE_TEMPLATE/question.md

@@ -6,10 +6,6 @@ labels: question
 assignees: ''
 ---
 
-### SDK Version
-
-V2 / V3
-
 ### Description
 
 A clear and concise description of your question.

.github/pull_request_template.md

@@ -19,3 +19,9 @@
 ### How has this been tested?
 
 <!-- Describe the testing you have done. -->
+
+### Checklist
+
+- [ ] Unit tests added/updated
+- [ ] Documentation updated (if needed)
+- [ ] No breaking changes (or described above)