give push permissions on specs repo to rust-libp2p maintainers

[jxs]

Summary

give push/write permissions and subsequently allow members of the rust-libp2p to approve spec PR's

[github-actions]

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

Access Changes

User agemanning:
  - will gain push permission to specs
User elenaf9:
  - will gain push permission to specs
User jxs:
  - will have the permission to specs change from pull to push

[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_repository.this["rust-libp2p maintainers:specs"] will be created
  + resource "github_team_repository" "this" {
      + etag       = (known after apply)
      + id         = (known after apply)
      + permission = "push"
      + repository = "specs"
      + team_id    = "11402594"
    }

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