SUBMARINE-1410. Update website node to 18

[cdmikechen]

What is this PR for?

Update website node to 18(lts)

What type of PR is it?

Documentation

Todos

• [x] - Set node to 18 in git workflow

What is the Jira issue?

https://issues.apache.org/jira/browse/SUBMARINE-1410

How should this be tested?

CI

Screenshots (if appropriate)

Questions:

• Do the license files need updating? No
• Are there breaking changes for older versions? No
• Does this need new documentation? No

[codecov[bot]]

Codecov Report

Merging #1106 (69cdb1a) into master (6ed412e) will increase coverage by 12.86%. Report is 1 commits behind head on master. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1106       +/-   ##
===========================================
+ Coverage   53.97%   66.83%   +12.86%     
===========================================
  Files         130      130               
  Lines        6320     6320               
===========================================
+ Hits         3411     4224      +813     
+ Misses       2909     2096      -813     

Flag	Coverage Δ
python-integration	53.97% <ø> (ø)
python-unit	47.86% <ø> (?)

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see 47 files with indirect coverage changes

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