remove hyphens and fix year copyright coverage

[kheiss-uwzoo]

Description

remove hyphens and fix year copyright coverage.

[JiwaniZakir]

The %Y format specifier in both the file header comment and the copyright variable in docs/conf.py will not be automatically substituted — Sphinx does not process strftime-style tokens in the copyright string. As a result, the built docs will literally display "2025-%Y, NVIDIA Corporation" rather than a dynamic year range. If the intent is to show a year range through the current year, it needs to be computed explicitly, e.g., copyright = f"2025-{datetime.datetime.now().year}, NVIDIA Corporation" with a corresponding import datetime at the top of the file.

The rename of project from " NVIDIA-RAG-blueprint" to " NVIDIA RAG blueprint" is reasonable for readability, but note the leading space in that string has been present since before this PR and is likely unintentional — worth cleaning up in the same pass. Also, the PR description says "remove hyphens," but the %Y addition is a separate, unrelated change that significantly affects the copyright output and should be called out explicitly in the PR description.

[kheiss-uwzoo]

#416
https://docs.nvidia.com/rag/latest/index.html