[BUG #4080]fix bug When using post requests, you can add parameters after the ur…

[ableYang123]

[BUG] When using post requests, you can add parameters after the url to crack signature authentication #4080

[codecov-commenter]

Codecov Report

Merging #4089 (09150fe) into master (28c5594) will decrease coverage by 0.11%.
The diff coverage is 81.48%.

@@             Coverage Diff              @@
##             master    #4089      +/-   ##
============================================
- Coverage     70.31%   70.20%   -0.12%     
+ Complexity     6941     6917      -24     
============================================
  Files           944      944              
  Lines         25961    25961              
  Branches       2337     2336       -1     
============================================
- Hits          18255    18225      -30     
- Misses         6289     6317      +28     
- Partials       1417     1419       +2     

Impacted Files	Coverage Δ
...java/org/apache/shenyu/plugin/sign/SignPlugin.java	93.75% <66.66%> (ø)
...java/org/apache/shenyu/common/utils/SignUtils.java	84.21% <78.57%> (-6.70%)	⬇️
...shenyu/plugin/sign/service/DefaultSignService.java	88.88% <85.71%> (-3.57%)	⬇️
...he/shenyu/plugin/sign/api/DefaultSignProvider.java	100.00% <100.00%> (ø)
...shenyu/plugin/sign/api/ShenyuSignProviderWrap.java	100.00% <100.00%> (ø)
...org/apache/shenyu/plugin/sign/api/SignService.java	100.00% <100.00%> (ø)
...controller/ShenyuClientHttpRegistryController.java	77.77% <0.00%> (-22.23%)	⬇️
...ruptor/RegisterClientServerDisruptorPublisher.java	52.94% <0.00%> (-11.77%)	⬇️
.../apache/shenyu/admin/model/dto/BatchCommonDTO.java	50.00% <0.00%> (-7.15%)	⬇️
...apache/shenyu/admin/model/dto/AuthPathWarpDTO.java	57.14% <0.00%> (-7.15%)	⬇️
... and 25 more

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[yunlongn]

thank your pr. you can update the documentation. https://shenyu.apache.org/zh/docs/plugin-center/security/sign-plugin

[moremind]

pls resolve conflicts