fix(deps): update opentelemetry-go monorepo

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go.opentelemetry.io/otel	require	minor	v1.20.0 -> v1.21.0
go.opentelemetry.io/otel/exporters/prometheus	require	minor	v0.43.0 -> v0.44.0
go.opentelemetry.io/otel/metric	require	minor	v1.20.0 -> v1.21.0
go.opentelemetry.io/otel/sdk/metric	require	minor	v1.20.0 -> v1.21.0

---

Release Notes

open-telemetry/opentelemetry-go (go.opentelemetry.io/otel)

v1.21.0: Release 1.21.0/0.44.0

Compare Source

Removed

• Remove the deprecated go.opentelemetry.io/otel/bridge/opencensus.NewTracer. (#​4706)
• Remove the deprecated go.opentelemetry.io/otel/exporters/otlp/otlpmetric module. (#​4707)
• Remove the deprecated go.opentelemetry.io/otel/example/view module. (#​4708)
• Remove the deprecated go.opentelemetry.io/otel/example/fib module. (#​4723)

Fixed

• Do not parse non-protobuf responses in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#​4719)
• Do not parse non-protobuf responses in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#​4719)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.