Update install-distribution.yml

[flybyray]

allow overriding the current non generic name pattern.

e.g. to set "@nginx:1.24/common"

Proposed changes

Describe the use case and detail of the change. If this PR addresses an issue on GitHub, make sure to include a link to that issue using one of the supported keywords in this PR's description or commit message.

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• [O] I have signed the F5 Contributor License Agreement (CLA).
• If applicable, I have added Molecule tests that prove my fix is effective or that my feature works.
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• [O] I have updated any relevant documentation (defaults/main/*.yml, README.md and CHANGELOG.md).

I just used github.com edit. not sure if i can edit multiple files in a simple change.

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[flybyray]

I have hereby read the F5 CLA and agree to its terms

I have hereby read the F5 CLA and agree to its terms