meta/sql: fix parentDst nlink in rename

[SandyXSD]

No description provided.

[davies]

Can you update the tests to cover this?

[codecov-commenter]

Codecov Report

Merging #1082 (7f9ff9d) into main (37c59f7) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #1082      +/-   ##
============================================
- Coverage     53.37%   53.30%   -0.08%     
  Complexity      149      149              
============================================
  Files           147      147              
  Lines         22707    22707              
  Branches        422      422              
============================================
- Hits          12120    12104      -16     
- Misses         9126     9140      +14     
- Partials       1461     1463       +2     

Impacted Files	Coverage Δ
pkg/meta/sql.go	68.68% <100.00%> (ø)
pkg/vfs/reader.go	76.45% <0.00%> (-3.11%)	⬇️
pkg/vfs/handle.go	85.71% <0.00%> (-0.85%)	⬇️
pkg/fuse/fuse.go	30.22% <0.00%> (+0.64%)	⬆️

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