docs(cmd/gen): improve comments for command gen dao

[houseme]

improve comment

[gqcn]

@houseme Comment变化了，对应的单测都会失败。。。需要都改了😅

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@houseme If Comment changes, the corresponding single test will fail. . . All needs have been changed.

[houseme]

@houseme Comment变化了，对应的单测都会失败。。。需要都改了😅

再改，太多了，哈哈

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@houseme If Comment changes, the corresponding single test will fail. . . Everything needs to be changed😅

If you change it again, it will be too much, haha

[gqcn]

@houseme Comment变化了，对应的单测都会失败。。。需要都改了😅

再改，太多了，哈哈

总感觉咱们这种单测不是很优雅，一点有点风吹草动改动有点大，但是我一时半会也没想到更好的改进方案。

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@houseme If Comment changes, the corresponding single test will fail. . . Everything needs to be changed😅

Change again, too many, haha

I always feel that our single test is not very elegant, and the changes are a bit rough, but I haven't thought of a better improvement plan for a while.

[houseme]

@houseme Comment变化了，对应的单测都会失败。。。需要都改了😅

再改，太多了，哈哈

总感觉咱们这种单测不是很优雅，一点有点风吹草动改动有点大，但是我一时半会也没想到更好的改进方案。

慢慢来，积累中成长

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@houseme If Comment changes, the corresponding single test will fail. . . Everything needs to be changed😅

Change again, too many, haha

I always feel that our single test is not very elegant, and the changes are a bit rough, but I haven't thought of a better improvement plan for a while.

Take your time and grow through accumulation