Further improvements to Safety's new html output

[codecov[bot]]

Codecov Report

Base: 76.81% // Head: 76.82% // Increases project coverage by +0.01% :tada:

Coverage data is based on head (4054e43) compared to base (509f977). Patch coverage: 87.50% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #453 +/- ## =========================================== + Coverage 76.81% 76.82% +0.01% =========================================== Files 26 26 Lines 3519 3526 +7 =========================================== + Hits 2703 2709 +6 - Misses 816 817 +1 ``` | [Impacted Files](https://codecov.io/gh/pyupio/safety/pull/453?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyupio) | Coverage Δ | | |---|---|---| | [safety/output\_utils.py](https://codecov.io/gh/pyupio/safety/pull/453?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyupio#diff-c2FmZXR5L291dHB1dF91dGlscy5weQ==) | `88.12% <87.50%> (-0.04%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyupio). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyupio)

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