Fix problems in the developer guide md file
Fix problems in the developer guide md file

1, Spelling mistakes
2, Grammar mistakes
3, change to format with better manner

Signed-off-by: song chen <ae7d166f23a6fc29809e39146fc64585e5c46680@linuxep.com>

msopentechcn/open-hackathon,juniwang/open-hackathon,juniwang/open-hackathon,juniwang/open-hackathon,msopentechcn/open-hackathon,msopentechcn/open-hackathon,msopentechcn/open-hackathon,msopentechcn/open-hackathon,juniwang/open-hackathon,msopentechcn/open-hackathon,juniwang/open-hackathon,juniwang/open-hackathon