Document link: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html-single/packaging_and_distributing_software/

Section number and name: Multiple(26 matches), starting from the "4.2.1. Preamble items section" to the "5.3.6. Using non-shell scripts in a spec file" section.

Describe the issue: The package release string mentioned in the documentation references RHEL 8, which is outdated for documentation that targets RHEL 9.

Impact of this issue: Package filenames in the example command will not match the actual package built in the documentation consumer's environment, causing various "file not found" error messages(e.g. RHELDOCS-19475).

Suggestions for improvement: Replace all references of `el8` to `el9`.