chore(rocky): set Rocky Linux 9 EOL

[MaineK00n]

What did you implement:

Rocky Linux 9.0 is now GA and EOL is set.
https://rockylinux.org/news/rocky-linux-9-0-ga-release/

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

before

$ vuls scan
[Jul 19 10:00:41]  INFO [localhost] vuls-v0.19.8-build-20220719_095936_d1a617c
[Jul 19 10:00:41]  INFO [localhost] Start scanning
[Jul 19 10:00:41]  INFO [localhost] config: /home/mainek00n/github/github.com/MaineK00n/vuls/config.toml
[Jul 19 10:00:41]  INFO [localhost] Validating config...
[Jul 19 10:00:41]  INFO [localhost] Detecting Server/Container OS... 
[Jul 19 10:00:41]  INFO [localhost] Detecting OS of servers... 
[Jul 19 10:00:42]  INFO [localhost] (1/1) Detected: vuls-target: rocky 9.0
[Jul 19 10:00:42]  INFO [localhost] Detecting OS of containers... 
[Jul 19 10:00:42]  INFO [localhost] Checking Scan Modes... 
[Jul 19 10:00:42]  INFO [localhost] Detecting Platforms... 
[Jul 19 10:00:43]  INFO [localhost] (1/1) vuls-target is running on other
[Jul 19 10:00:43]  INFO [vuls-target] Scanning OS pkg in fast mode
[Jul 19 10:00:47]  WARN [localhost] Some warnings occurred during scanning on vuls-target. Please fix the warnings to get a useful information. Execute configtest subcommand before scanning to know the cause of the warnings. warnings: [Failed to check EOL. Register the issue to https://github.com/future-architect/vuls/issues with the information in `Family: rocky Release: 9.0`]


Scan Summary
================
vuls-target	rocky9.0	175 installed, 0 updatable

Warning: [Failed to check EOL. Register the issue to https://github.com/future-architect/vuls/issues with the information in `Family: rocky Release: 9.0`]



To view the detail, vuls tui is useful.
To send a report, run vuls report -h.

after

$ vuls scan
[Jul 19 10:08:19]  INFO [localhost] vuls-v0.19.8-build-20220719_100638_a7879f33
[Jul 19 10:08:19]  INFO [localhost] Start scanning
[Jul 19 10:08:19]  INFO [localhost] config: /home/mainek00n/github/github.com/MaineK00n/vuls/config.toml
[Jul 19 10:08:19]  INFO [localhost] Validating config...
[Jul 19 10:08:19]  INFO [localhost] Detecting Server/Container OS... 
[Jul 19 10:08:19]  INFO [localhost] Detecting OS of servers... 
[Jul 19 10:08:20]  INFO [localhost] (1/1) Detected: vuls-target: rocky 9.0
[Jul 19 10:08:20]  INFO [localhost] Detecting OS of containers... 
[Jul 19 10:08:20]  INFO [localhost] Checking Scan Modes... 
[Jul 19 10:08:20]  INFO [localhost] Detecting Platforms... 
[Jul 19 10:08:21]  INFO [localhost] (1/1) vuls-target is running on other
[Jul 19 10:08:21]  INFO [vuls-target] Scanning OS pkg in fast mode


Scan Summary
================
vuls-target	rocky9.0	175 installed, 0 updatable





To view the detail, vuls tui is useful.
To send a report, run vuls report -h.

Checklist:

You don't have to satisfy all of the following.

• Write tests
• Write documentation
• Check that there aren't other open pull requests for the same issue/feature
• Format your source code by make fmt
• Pass the test by make test
• Provide verification config / commands
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES

Reference

• https://rockylinux.org/news/rocky-linux-9-0-ga-release/
• docs(rocky): set Rocky Linux 9 EOL vulsdoc/vuls#210