Fix OGSubgraph.current crash in CFRelease

[Kyle-Ye]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 47.05882% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 12.67%. Comparing base (caae2e2) to head (9519417).

Files	Patch %	Lines
Sources/_OpenGraph/Graph/OGSubgraph.cpp	0.00%	5 Missing ⚠️
Sources/_OpenGraph/Util/assert.cpp	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
+ Coverage   11.54%   12.67%   +1.13%     
==========================================
  Files          38       39       +1     
  Lines         771      781      +10     
==========================================
+ Hits           89       99      +10     
  Misses        682      682              

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[Kyle-Ye]

WASM CI is blocked by swiftwasm/swift#5565