[Sha 256] Network Graph param extended_sha1 is misleading in context of sha256 repository
<!--IssueSummary start-->
<details>
<summary>
Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards.
</summary>
- [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=463863)
</details>
<!--IssueSummary end-->
<!-- Title suggestion: [Sha 256] <issue description> -->
The query param `extended_sha1` on the Repository Graph is misleading when the user is working with a SHA256 repository.
## Where in the application are you seeing this issue?
### URL of the page:
- https://gitlab.com/john.mcdonnell/sha256repo/-/network/main?extended_sha1=bafc1bdbd1c50915f6ac976c0749aa6f2b800584543ed670657e2dce4c35dc60
### How did you expect the application to behave?
URL Query Param should be either agnostic to SHA format, or be consistent with repository object format of the underlying project.
e.g.
- `/-/network/main?extended_sha256=bafc1bdbd1c50915f6ac976c0749aa6f2b800584543ed670657e2dce4c35dc60`
- `/-/network/main?extended_sha=bafc1bdbd1c50915f6ac976c0749aa6f2b800584543ed670657e2dce4c35dc60`
### How did the application behave?
Graph works as expected, but query params are misleading

<!-- Provide a description of how the application actually behaved -->
issue