add v6.0-3 lite models

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (7969480) 86.68% compared to head (67c6e43) 86.68%. Report is 1 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #367 +/- ## ======================================== Coverage 86.68% 86.68% ======================================== Files 69 69 Lines 1457 1457 ======================================== Hits 1263 1263 Misses 194 194 ``` | [Files](https://app.codecov.io/gh/Deeplite/deeplite-torch-zoo/pull/367?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Deeplite) | Coverage Δ | | |---|---|---| | [...te\_torch\_zoo/api/models/object\_detection/yolov6.py](https://app.codecov.io/gh/Deeplite/deeplite-torch-zoo/pull/367?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Deeplite#diff-ZGVlcGxpdGVfdG9yY2hfem9vL2FwaS9tb2RlbHMvb2JqZWN0X2RldGVjdGlvbi95b2xvdjYucHk=) | `96.00% <100.00%> (ø)` | |

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