Incorrect permission name prevents non-administrators from accessing streaming operations

The routes in `streaming_media_views.routing.yml` require:

_permission: 'Administer media'

However, Drupal’s permission machine name is lowercase:

_permission: 'administer media'

Permission checks are case-sensitive. Consequently, granting the standard “Administer media” permission does not give non-administrator users access to these routes:

• streaming.transcode
• streaming.refresh
• streaming.clear
• streaming.delete

Steps to reproduce:

1. Grant a non-administrator role the standard `administer media` permission.
2. Assign that role to a user.
3. As that user, open the transcode page for a Streaming video media item.

Actual result: Access denied.

Expected result: Users granted the required permission can access the operation.

Manually adding the uppercase `Administer media` string to the role configuration allows access, confirming the mismatch. However, this is not a durable workaround: Drupal removes undeclared permissions when recalculating a role’s dependencies during a normal role save.

Suggested fix: Replace `Administer media` with `administer media` in all four route requirements. Alternatively, declare dedicated permissions for streaming operations to avoid requiring broad media administration privileges.

Verified on Drupal 10.6.21.