feat(opentelemetry-instrumentation-pg): update types/pg version

[maryliag]

Update @types/pg-pool to latest

Fixes #2816

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.69%. Comparing base (24d8eab) to head (2425c0d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2823   +/-   ##
=======================================
  Coverage   89.69%   89.69%           
=======================================
  Files         184      184           
  Lines        8966     8966           
  Branches     1835     1835           
=======================================
  Hits         8042     8042           
  Misses        924      924           

Files with missing lines	Coverage Δ
...telemetry-instrumentation-pg/src/internal-types.ts	100.00% <ø> (ø)

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[maryliag]

test failures seem to be unrelated