fix support OffsetDateTime format output for issue #2005

[yanxutao89]

What this PR does / why we need it?

fix support OffsetDateTime format output for issue #2005

Summary of your change

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

[codecov-commenter]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (0ed86db) 75.25% compared to head (e534a16) 73.55%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2006      +/-   ##
============================================
- Coverage     75.25%   73.55%   -1.71%     
+ Complexity    21525    20814     -711     
============================================
  Files           634      622      -12     
  Lines         85217    84483     -734     
  Branches      18872    18674     -198     
============================================
- Hits          64133    62144    -1989     
- Misses        13162    14374    +1212     
- Partials       7922     7965      +43     

Files	Coverage Δ
...java/com/alibaba/fastjson2/writer/FieldWriter.java	64.93% <50.00%> (-0.97%)	⬇️
...in/java/com/alibaba/fastjson2/JSONReaderUTF16.java	72.54% <20.00%> (-0.47%)	⬇️
...ain/java/com/alibaba/fastjson2/JSONReaderUTF8.java	65.37% <20.00%> (-4.35%)	⬇️

... and 80 files with indirect coverage changes

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