Temporarily escalate @biglep to org owner

[BigLep]

Temporary org ownership is needed to complete https://github.com/filecoin-project/github-mgmt/issues/47

It enables me to

1. Access the (audit log)[https://docs.github.com/en/organizations/keeping-your-organization-secure/managing-security-settings-for-your-organization/reviewing-the-audit-log-for-your-organization] so I can be sure I'm not advocating for removing owner ownership of someone who has been very active on administering the org
2. Give the "github-mgmt Stewards" team moderator and security manager roles.

Access here will be revoked as part of completing https://github.com/filecoin-project/github-mgmt/issues/47, which should happen no later than the week of 2024-09-02.

Reviewer's Checklist

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

[github-actions[bot]]

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

Access Changes

``` User biglep: - will have the role in the organization change from member to admin ```

[github-actions[bot]]

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

Terraform plans

filecoin-project

``` Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols: ~ update in-place Terraform will perform the following actions: # github_membership.this["biglep"] will be updated in-place ~ resource "github_membership" "this" { id = "filecoin-project:BigLep" ~ role = "member" -> "admin" # (2 unchanged attributes hidden) } Plan: 0 to add, 1 to change, 0 to destroy. ```