chore: update node version in nvmrc to v16

[ktmud]

SUMMARY

#16809 updated node version but it didn't update nvmrc. It's better to keep them consistent.

cc @villebro

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #17492 (6a6b4bd) into master (69c3cc7) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #17492   +/-   ##
=======================================
  Coverage   76.97%   76.97%           
=======================================
  Files        1043     1043           
  Lines       56381    56381           
  Branches     7798     7798           
=======================================
+ Hits        43400    43402    +2     
+ Misses      12725    12723    -2     
  Partials      256      256           

Flag	Coverage Δ
hive	81.56% <ø> (ø)
javascript	71.05% <ø> (ø)
mysql	81.98% <ø> (ø)
postgres	81.99% <ø> (ø)
presto	81.86% <ø> (+<0.01%)	⬆️
python	82.49% <ø> (+<0.01%)	⬆️
sqlite	81.67% <ø> (ø)

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

Impacted Files	Coverage Δ
superset/db_engine_specs/presto.py	90.37% <0.00%> (+0.41%)	⬆️

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[villebro]

LGTM, thanks for catching 👍

[villebro]

Merging to get this into master