fix: grpc endpoint

[horw]

Description

Hello!
Your tutorial was very helpful for me. I found that the new version of the collector no longer uses 0.0.0.0 as the default, so in this MR, I fixed it. You can find more information about the update at: https://github.com/open-telemetry/opentelemetry-collector/releases/tag/v0.104.0

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: lzchen / name: Leighton Chen (23f21d6)
• ✅ login: horw / name: Igor Udot (b6eaba0)

[horw]

I suspect that many examples will have the same issue. If you agree, I can review and update other examples as well.

[emdneto]

I think this makes sense since otel-collector in the latest version:

The otlpreceiver now uses localhost by default instead of 0.0.0.0

Care to fix the README as well?

[xrmx]

Please also update docs/examples/metrics/instruments/otel-collector-config.yaml

[horw]

@emdneto @xrmx Thanks, Updated!