add guillaumemichel as rust-libp2p Maintainers member

[guillaumemichel]

Summary

add guillaumemichel as rust-libp2p Maintainers member

Why do you need this?

release rust-libp2p crates

DRI: myself

Reviewer's Checklist

• It is clear where the request is coming from (if unsure, ask)
• All the automated checks passed
• The YAML changes reflect the summary of the request
• The Terraform plan posted as a comment reflects the summary of the request

[github-actions]

The following access changes will be introduced as a result of applying the plan:

Access Changes

User guillaumemichel:
  - will gain maintain permission to rust-libp2p-identity
  - will gain maintain permission to universal-connectivity

[github-actions]

Before merge, verify that all the following plans are correct. They will be applied as-is after the merge.

Terraform plans

libp2p

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # github_team_membership.this["rust-libp2p maintainers:guillaumemichel"] will be created
  + resource "github_team_membership" "this" {
      + etag     = (known after apply)
      + id       = (known after apply)
      + role     = "member"
      + team_id  = "6797340"
      + username = "guillaumemichel"
    }

Plan: 1 to add, 0 to change, 0 to destroy.