[Doc][37_Signature] Introduction information is incorrect

[phoouze]

Details(细节)

1. This link points to the Discord link.
   
2. The introductory information for many other chapters is inconsistent.
   
   

Are you willing to submit a PR?(你愿意提交PR吗？)

• Yes I am willing to submit a PR!(是的我愿意)

[phoouze]

and the image did not display

[phoouze]

@XdpCs 看下

[XdpCs]

@XdpCs 看下

I will check it.

[XdpCs]

Details(细节)

1. This link points to the Discord link.
   
2. The introductory information for many other chapters is inconsistent.
   
   

Are you willing to submit a PR?(你愿意提交PR吗？)

• Yes I am willing to submit a PR!(是的我愿意)

I will fix this title.