fix links check fail, remove speculators from docs

[DaltheCow]

We are getting link-check fails on the github rich display links. Not sure what the desired solution is but this gets the check passing by ignoring links like that.

Also we have what look to be some pasted doc remnants from the speculators repo so I changed everything saying speculators to guidellm

[nm-red-hat-upstream-automation-bot]

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[nm-red-hat-upstream-automation-bot]

📦 Build Artifacts Available
The build artifacts (.whl and .tar.gz) have been successfully generated and are available for download: https://github.com/neuralmagic/guidellm/actions/runs/15169751247/artifacts/3171167025.
They will be retained for up to 30 days.

[nm-red-hat-upstream-automation-bot]

📦 Build Artifacts Available
The build artifacts (.whl and .tar.gz) have been successfully generated and are available for download: https://github.com/neuralmagic/guidellm/actions/runs/15170947437/artifacts/3171613367.
They will be retained for up to 30 days.