fix(natives/rpc): Keep code fencing in doc summary

[tens0rfl0w]

Goal of this PR

Removing leading and trailing backticks from the native summary section breaks formatting if the summary only contains formatted code.

How is this PR achieving the goal

Removal of the regex pattern matching for leading and trailing backticks in the doc string parse function when native md is being generated.

See issue https://github.com/citizenfx/natives/issues/1124 for a showcase of the mismatch between client and server native docs.

This PR applies to the following area(s)

Natives

Successfully tested on

Game builds: Not applicable

Platforms: Windows

Checklist

• [x] Code compiles and has been tested successfully.
• [x] Code explains itself well and/or is documented.
• [x] My commit message explains what the changes do and what they are for.
• [x] No extra compilation warnings are added by these changes.

Fixes issues

fixes https://github.com/citizenfx/natives/issues/1124