[jira] [Created] (HBASE-26439) improve upgrading doc

[guo (Jira)]

guo created HBASE-26439:
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             Summary: improve upgrading doc
                 Key: HBASE-26439
                 URL: https://issues.apache.org/jira/browse/HBASE-26439
             Project: HBase
          Issue Type: Improvement
          Components: documentation
    Affects Versions: 2.4.8
            Reporter: guo


improve upgrading doc



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