fix: properly dispose of the client

[sadan4]

this fixes a bug introduced in 119f32a (and somehow not noticed in 6eb243e ????)

[skovhus]

@mads-hartmann, we need to update the vscode Personal Access Token.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.74%. Comparing base (29d81c7) to head (295659e).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
vscode-client/src/extension.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1344      +/-   ##
==========================================
+ Coverage   80.63%   80.74%   +0.10%     
==========================================
  Files          29       29              
  Lines        1503     1501       -2     
  Branches      371      371              
==========================================
  Hits         1212     1212              
+ Misses        233      231       -2     
  Partials       58       58              

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