fix: Bump Otel semconv version to avoid error in tracing.NewResource()

[smf8]

Hi, Currently the master branch and ghcr.io/gubernator-io/gubernator:v2.7.1 image tag won't run with following error.

INFO[0000] Gubernator dev-build (arm64/darwin)
FATA[0000] during tracing.NewResource()                  category=gubernator error="error in resource.Merge on resources index 0: conflicting Schema URL: https://opentelemetry.io/schemas/1.24.0 and https://opentelemetry.io/schemas/1.21.0"
exit status 1

I feel like this is similar to this commit:

fc29185

[thrawn01]

Now available in v2.7.2