[type:fix] fix JwtUtils

[moremind]

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• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4420 (8dc0391) into master (18b3ac1) will decrease coverage by 0.07%.
The diff coverage is 37.75%.

@@             Coverage Diff              @@
##             master    #4420      +/-   ##
============================================
- Coverage     68.09%   68.02%   -0.07%     
- Complexity     7483     7491       +8     
============================================
  Files          1021     1022       +1     
  Lines         28913    28992      +79     
  Branches       2583     2592       +9     
============================================
+ Hits          19689    19723      +34     
- Misses         7683     7721      +38     
- Partials       1541     1548       +7     

Impacted Files	Coverage Δ
...g/apache/shenyu/common/cache/WindowTinyLFUMap.java	0.00% <0.00%> (ø)
.../org/apache/shenyu/common/config/ShenyuConfig.java	68.89% <33.33%> (-1.97%)	⬇️
...pache/shenyu/plugin/base/AbstractShenyuPlugin.java	44.59% <38.63%> (+0.33%)	⬆️
...n/java/org/apache/shenyu/admin/utils/JwtUtils.java	77.77% <100.00%> (ø)
.../plugin/base/cache/CommonPluginDataSubscriber.java	73.39% <100.00%> (+0.75%)	⬆️
...pache/shenyu/plugin/base/cache/MatchDataCache.java	100.00% <100.00%> (ø)
...e/shenyu/web/controller/LocalPluginController.java	94.65% <100.00%> (+0.02%)	⬆️
...henyu/admin/service/impl/UpstreamCheckService.java	66.66% <0.00%> (-1.15%)	⬇️
...henyu/common/cache/MemorySafeWindowTinyLFUMap.java	73.33% <0.00%> (ø)
...henyu/plugin/grpc/resolver/ShenyuNameResolver.java	61.70% <0.00%> (+5.31%)	⬆️

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