chore(renovate): ignore http-proxy-middleware updates

[hiroppy]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

no

Motivation / Use-Case

for #2252

Breaking Changes

Additional Info

[hiroppy]

I'll delete this config at the next branch.

[codecov]

Codecov Report

Merging #2269 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #2269   +/-   ##
======================================
  Coverage    93.9%   93.9%           
======================================
  Files          34      34           
  Lines        1280    1280           
  Branches      368     368           
======================================
  Hits         1202    1202           
  Misses         71      71           
  Partials        7       7

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