Move invalid CHANGELOG entry into more accurate position

[jakubfijalkowski]

Hey,

After merging my PR #1877 (thanks!) my then-added CHANGELOG.md entry has been placed under version 1.17.0 which was then-to-be-released, but now is invalid. This PR moves that entry into more appropriate 1.17.2 (if that will be the version released).

[akshita31]

For now let us do "1.18.0"

[codecov]

Codecov Report

Merging #2699 into master will increase coverage by 0.34%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2699      +/-   ##
==========================================
+ Coverage    65.2%   65.54%   +0.34%     
==========================================
  Files          99       99              
  Lines        4328     4328              
  Branches      631      631              
==========================================
+ Hits         2822     2837      +15     
+ Misses       1318     1307      -11     
+ Partials      188      184       -4

Flag	Coverage Δ
#integration	53.78% <ø> (+0.34%)	⬆️
#unit	84.84% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
src/omnisharp/server.ts	70.4% <0%> (+0.34%)	⬆️
src/features/diagnosticsProvider.ts	81.33% <0%> (+1.33%)	⬆️
src/features/codeLensProvider.ts	48.54% <0%> (+1.94%)	⬆️
src/features/completionItemProvider.ts	87.87% <0%> (+9.09%)	⬆️
src/features/documentation.ts	47.61% <0%> (+9.52%)	⬆️

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[akshita31]

Thanks!