[Minor] Fix typos in the template (#3234)

* Fix typos in the template

* Fix grammar

* Add PR type

* Address comments

.github/ISSUE_TEMPLATE/bug-report.md

@@ -11,18 +11,18 @@ assignees: ''
 
 Please check the [FAQ](https://github.com/vesoft-inc/nebula/blob/master/docs/manual-EN/1.overview/2.quick-start/2.FAQ.md) documentation and old issues before raising an issue in case someone has asked the same question that you are asking.
 
-**Describe the bug (__must be provided__)**
+**Describe the bug (__required__)**
 
 A clear and concise description of what the bug is.
 
-**Your Environments (__must be provided__)**
+**Your Environments (__required__)**
 
 * OS: `uname -a`
-* Compliler: `g++ --version` or `clang++ --version`
+* Compiler: `g++ --version` or `clang++ --version`
 * CPU: `lscpu`
 * Commit id (e.g. `a3ffc7d8`)
 
-**How To Reproduce(__must be provided__)**
+**How To Reproduce(__required__)**
 
 Steps to reproduce the behavior:
 

.github/pull_request_template.md

@@ -1,12 +1,12 @@
 #### What type of PR is this?
 - [ ] bug
 - [ ] feature
+- [ ] enhancement
 
-#### Which issue(s) this PR fixes:
-close #xxx   
-（If it is requirement, issue(s) number must be listed.）
+#### What does this PR do?
 
-#### What this PR does / why we need it?
+
+#### Which issue(s)/PR(s) this PR relates to?
 
 
 #### Special notes for your reviewer, ex. impact of this fix, etc:
@@ -16,12 +16,10 @@ close #xxx
 
 
 #### Checklist：
-- [ ] Documentation affected （If need to modify document, please label it.)
-- [ ] Incompatible （If it is incompatile, please describle it and label it.）
-- [ ] Need to cherry pick （If need to cherry pick to some branchs, please label the destination version(s).)
-- [ ] Performance regression: Consumes more CPU
-- [ ] Performance regression: Consumes more Memory
-
+- [ ] Documentation affected （Please add the label if documentation needs to be modified.)
+- [ ] Incompatible （If it is incompatible, please describe it and add corresponding label.）
+- [ ] Need to cherry-pick （If need to cherry-pick to some branches, please label the destination version(s).)
+- [ ] Performance impacted: Consumes more CPU/Memory
 
 
 #### Release notes：