release branch: Update release date in change log to Nov 18th

[karthiknadig]

No description provided.

[codecov-io]

Codecov Report

Merging #8604 into release-2019.11 will increase coverage by 0.06%.
The diff coverage is n/a.

@@                 Coverage Diff                 @@
##           release-2019.11    #8604      +/-   ##
===================================================
+ Coverage            59.47%   59.53%   +0.06%     
===================================================
  Files                  509      509              
  Lines                23397    23571     +174     
  Branches              3780     3823      +43     
===================================================
+ Hits                 13916    14034     +118     
- Misses                8576     8622      +46     
- Partials               905      915      +10

Impacted Files	Coverage Δ
...ience/interactive-common/interactiveWindowTypes.ts	100% <0%> (ø)	⬆️
...ient/datascience/interactive-ipynb/nativeEditor.ts	61.71% <0%> (+2.94%)	⬆️

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[karthiknadig]

@brettcannon Can you merge this one? It just a change to the date in change log.