chore: update core and api to 0.21.0

[dyladan]

Depends on open-telemetry/opentelemetry-js#2269

[codecov]

Codecov Report

Merging #529 (c3c13a9) into main (6a8f1f4) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #529      +/-   ##
==========================================
- Coverage   94.84%   94.82%   -0.03%     
==========================================
  Files         152      148       -4     
  Lines        9226     9171      -55     
  Branches      918      917       -1     
==========================================
- Hits         8750     8696      -54     
+ Misses        476      475       -1     

Impacted Files	Coverage Δ
...elemetry-instrumentation-pg/src/instrumentation.ts	82.29% <100.00%> (ø)
...metry-instrumentation-winston/test/winston.test.ts	97.87% <0.00%> (-0.03%)	⬇️
...lemetry-instrumentation-bunyan/test/bunyan.test.ts	98.18% <0.00%> (-0.02%)	⬇️
...entelemetry-instrumentation-pino/test/pino.test.ts	100.00% <0.00%> (ø)
...ector-github/test/detectors/GitHubDetector.test.ts
...ce-detector-github/src/detectors/GitHubDetector.ts
...ry-resource-detector-github/src/detectors/index.ts
...ntelemetry-resource-detector-github/src/version.ts