fix: yamllint line-length warning

[Sunny-Mor]

what

• Updated the YAML linter configuration for line-length.
• Added max: 450 along with level: warning to enforce a soft line length limit.
• Ensures that lines exceeding 450 characters now trigger a warning instead of being unchecked.

why

• Earlier config only had level: warning without a max, so line length was not being validated.
• Setting max: 450 makes the rule meaningful and ensures code readability standards are followed.
• Warnings (instead of errors) help developers stay informed without blocking commits/PRs.

references

Related YAML linting rule docs: yamllint rules - line-length