[Fix] Add URL of Swin pretrained model.

[jbwang1997]

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Motivation

Add URL of Swin pretrained model.

Modification

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

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If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

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Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. The documentation has been modified accordingly, like docstring or example tutorials.

[yangxue0827]

LGTM

[codecov-commenter]

Codecov Report

Merging #111 (ecfe17b) into dev (077ae5d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #111   +/-   ##
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  Coverage   28.96%   28.96%           
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  Files         104      104           
  Lines        6581     6581           
  Branches      985      985           
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  Hits         1906     1906           
  Misses       4609     4609           
  Partials       66       66           

Flag	Coverage Δ
unittests	28.94% <ø> (ø)

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[zytx121]

There are some configurations in configs/kfiou that also use Swin, should we modify them together?

[zytx121]

LGTM