[BUG] Repo metadata unavailable on Rocky Linux 9.5

[afeefmazlan]

Describe the bug Error 404 on downloading Terra repository metadata on Rocky Linux 9

To Reproduce Steps to reproduce the behavior:

1. Open terminal
2. Install terra by running "dnf install --nogpgcheck --repofrompath 'terra,https://repos.fyralabs.com/terra$releasever' terra-release"
3. Search any package through dnf (example; dnf search zed)
4. Terminal displays error:

Errors during downloading metadata for repository 'terra':
Status code: 404 for https://repos.fyralabs.com/terra9/repodata/repomd.xml
Error: Failed to download metadata for repo 'terra': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
Ignoring repositories: terra

Expected behavior Zed was able to be listed using dnf search

Affected (please complete the following information):

• Rocky Linux 9.5
• Package [e.g. terra]

[linear[bot]]

FYRA-317 [BUG] Repo metadata unavailable on Rocky Linux 9.5

[GildedRoach]

We only support EL10. However, even in this case, Zed currently cannot be built on EL.

Note: The way to install Terra on EL is dnf install --nogpgcheck --repofrompath 'terra,https://repos.fyralabs.com/terrael$releasever' terra-release

[madonuko]

• [ ] update website with el instructions
• [x] update readme
• [x] update devdocs