chore(zarrs_opendal): bump opendal to 0.51

[LDeakin]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 58.33333% with 20 lines in your changes missing coverage. Please review.

Project coverage is 81.91%. Comparing base (9a4c540) to head (ec62841).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
zarrs_opendal/src/async.rs	58.33%	10 Missing ⚠️
zarrs_opendal/src/sync.rs	58.33%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
- Coverage   81.97%   81.91%   -0.07%     
==========================================
  Files         166      166              
  Lines       23489    23512      +23     
==========================================
+ Hits        19255    19259       +4     
- Misses       4234     4253      +19     

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