fix:go-http plugin path encoding error

[J-guanghua]

Description (what this PR does / why we need it):

Which issue(s) this PR fixes (resolves / be part of):

fix(kratos/cmd/protoc-gen-go-http/http.go:243) go-http plugin path encoding error #2873

Other special notes for the reviewers:

[codecov-commenter]

Codecov Report

Merging #2917 (415088e) into main (bffc1a0) will not change coverage.
Report is 4 commits behind head on main.
The diff coverage is n/a.

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  Coverage   84.43%   84.43%           
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  Files          88       88           
  Lines        3976     3976           
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  Hits         3357     3357           
  Misses        443      443           
  Partials      176      176