[Bug]: Documentation outdated

### What happened?

[This guide](https://aswf-openrv.readthedocs.io/en/latest/build_system/config_linux_rocky89.html#build-the-image-and-run) needs updating.

```
docker build -t openrv-rocky9 -f Dockerfile.Linux-Rocky9 .
[+] Building 0.1s (1/1) FINISHED docker:default
=> [internal] load build definition from Dockerfile.Linux-Rocky9 0.0s
=> => transferring dockerfile: 2B 0.0s
ERROR: failed to build: failed to solve: failed to read dockerfile: open Dockerfile.Linux-Rocky9: no such file or directory
```

### List all the operating systems versions where this is happening

*

### On what computer hardware is this happening?

*

### Relevant console log output

```shell

```

### Environment variables

_No response_

### Extra information

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Open the linked Read the Docs guide at the “Build the image and run” section and inspect the repository’s Rocky 9 Dockerfile naming and location. Verify the documented Docker command against the available file; done when the guide uses a command that can find the Dockerfile and build the image successfully.

Written by the indexing model from the issue text.