chore(deps): bump github.com/elastic/opentelemetry-lib (#670)

Bumps [github.com/elastic/opentelemetry-lib](https://github.com/elastic/opentelemetry-lib) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/elastic/opentelemetry-lib/releases)
- [Commits](elastic/opentelemetry-lib@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: github.com/elastic/opentelemetry-lib
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

processor/elasticapmprocessor/go.mod

@@ -3,7 +3,7 @@ module github.com/elastic/opentelemetry-collector-components/processor/elasticap
 go 1.23.8
 
 require (
-	github.com/elastic/opentelemetry-lib v0.20.0
+	github.com/elastic/opentelemetry-lib v0.21.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/golden v0.130.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/pdatatest v0.130.0
 	github.com/stretchr/testify v1.10.0

processor/elasticapmprocessor/go.sum

@@ -4,8 +4,8 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/elastic/opentelemetry-lib v0.20.0 h1:SOKlIJhjAnZk4IhrudbiU7bmgbeZKe/5zRIxxI46++w=
-github.com/elastic/opentelemetry-lib v0.20.0/go.mod h1:UJNsdGOawf4Ap3WfFTeh/HmS767bHFEc8WDBGqH9uMc=
+github.com/elastic/opentelemetry-lib v0.21.0 h1:aktZQ6hocz/yVMOikDrdcjWtl/qcK/AfMBundZJTCcQ=
+github.com/elastic/opentelemetry-lib v0.21.0/go.mod h1:mNcdHi6ivTn5w4bE18as43gzKt2rVmK4HCeJZ9JmFXk=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
 github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=