Docs: modify issue-specification.md

docs/contribution/issue specification.md

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+# issue specification
+
+  we use [lot issues](https://github.com/openIMSDK/openKF/issues) before reporting bugs, Please make sure that has been
+  searching similar [question](https://github.com/OpenIMSDK/OpenKF/issues), because they may have already answered or
+  is being repaired. New questions should be directed
+  to [question assistant](https://github.com/OpenIMSDK/OpenKF/issues/new/choose) submitted. For bug reports, include
+  code that can
+  be used to reproduce the problem and how to reproduce
+  it. For new feature suggestions, indicate the changes you want and the expected behavior.
+
+## **for committer**
+
+##### **working for pr**
+
+- commiters should finish code unit test again and record test dirary and if nessary do somke test
+- commiters should check for code
+  convenant [code convenant](https://github.com/OpenIMSDK/OpenKF/blob/main/CONTRIBUTING.md)
+
+##### **working for issue management**
+
+- add labels to each issue and check it out.
+- format issue style when needed.
+- keep in touch with each contributor.
+- Keep up with the status of the issue.
+- assign one or more who to solve it.
+
+## **for contributor**
+
+##### **raise issue**
+
+- developers should add full labels for issue you raised.(including **kind**(问题类型 such as,feat,bug),**Degree of
+  importance**(重要程度 emergency，important，normal),**strategy**(处置策略 such as self ,paticipant,coperation),*
+  *progress**(进度 such as running,later),**size**(问题规模 such as L,M,XXL))
+
+##### **claim issue and make pr**
+
+- developers can claim it by comment （want to claim + issueId）
+- when doing pr process, developer should make Incremental testing at first and then doing **/contributor.md 's**
+  process.
+