Bump nbconvert from 5.5.0 to 6.3.0 in /lambdas/preview

[dependabot[bot]]

Bumps nbconvert from 5.5.0 to 6.3.0.

Commits

• cefe0bf Release 6.3.0
• a534fb9 Release 6.3.0b0
• 87920c5 Add changelog for 6.3.0 (#1669)
• dd6d9c7 add slide numbering (#1654)
• 5d2c5e2 Update state filter (#1664)
• 11ea593 fix: avoid closing the script tag early by escaping a forward slash (#1665)
• 968c5fb Fix HTML templates mentioned in help docs (#1653)
• 35c4d07 Add a new output filter that excludes widgets if there is no state (#1643)
• c663c75 6.2.0
• fd1dd15 6.2.0rc2
• Additional commits viewable in compare view

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[codecov[bot]]

Codecov Report

Merging #2978 (34cb47c) into master (fad120d) will decrease coverage by 0.00%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2978      +/-   ##
==========================================
- Coverage   38.80%   38.80%   -0.01%     
==========================================
  Files         623      623              
  Lines       27630    27628       -2     
  Branches     4009     4009              
==========================================
- Hits        10722    10720       -2     
  Misses      15763    15763              
  Partials     1145     1145              

Flag	Coverage Δ
api-python	90.71% <ø> (ø)
catalog	12.25% <ø> (ø)
lambda	87.29% <100.00%> (-0.01%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lambdas/preview/src/t4_lambda_preview/__init__.py	98.23% <100.00%> (-0.04%)	:arrow_down:

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[sir-sigurd]

@dependabot use these labels

[dependabot[bot]]

OK, from now on I'll use python.