chore: update description for portal assets repo

[evegufy]

Description

update description for portal assets repo to improve transparency

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• [x] DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• [x] Copyright and license header are present on all affected files

[eclipse-otterdog[bot]]

This is your friendly self-service bot.

Thank you for raising a pull request to update the configuration of your GitHub organization. You can manually add reviewers to this PR to eventually enable auto-merging.

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• valid configuration
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• does not require any secrets
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[eclipse-otterdog[bot]]

This is your friendly self-service bot.

The author (evegufy) of this PR is associated with this organization in the role of MEMBER.

Additionally, evegufy is a member of the following teams:

• automotive-tractusx-committers

• automotive-tractusx-project-leads

[eclipse-otterdog[bot]]

This is your friendly self-service bot. Please find below the validation of the requested configuration changes:

Diff for e015c6e604bd8b81a53365686ddacc33715c0cfb

```diff Organization automotive.tractusx[id=eclipse-tractusx] there have been 66 validation infos, enable verbose output with '-v' to to display them. ! repository[name="portal-assets"] { ! description = "Portal Assets" -> "Portal Documentation and Static Image Content" ! } Plan: 0 to add, 1 to change, 0 to delete. ```

[eclipse-otterdog[bot]]

This is your friendly self-service bot. The current configuration is in-sync with the live settings. :rocket:

[eclipse-otterdog[bot]]

This is your friendly self-service bot. This Pull Request is eligible for auto-merging as it passed the following checks:

• valid configuration
• approved by a project lead
• does not require any secrets
• does not update settings only accessible via the GitHub Web UI
• does not remove any resource

In order to automatically merge and apply the changes, add a comment /otterdog merge. :rocket:

[eclipse-otterdog[bot]]

This is your friendly self-service bot.

The following changes have been successfully applied:

Organization automotive.tractusx[id=eclipse-tractusx]
  there have been 66 validation infos, enable verbose output with '-v' to to display them.

!   repository[name="portal-assets"] {
!     description                       = "Portal Assets" -> "Portal Documentation and Static Image Content"
!   }

  Applying changes:

  Done.

  Executed plan: 0 added, 1 changed, 0 deleted.