update dockerfile with pt1.6

[nbei]

No description provided.

[codecov]

Codecov Report

Merging #144 into master will increase coverage by 0.10%.
The diff coverage is 82.35%.

@@            Coverage Diff             @@
##           master     #144      +/-   ##
==========================================
+ Coverage   82.14%   82.25%   +0.10%     
==========================================
  Files         143      145       +2     
  Lines        6487     6711     +224     
  Branches      964      994      +30     
==========================================
+ Hits         5329     5520     +191     
- Misses       1062     1090      +28     
- Partials       96      101       +5     

Flag	Coverage Δ
#unittests	82.25% <82.35%> (+0.10%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmedit/apis/generation_inference.py	23.07% <ø> (ø)
mmedit/apis/inpainting_inference.py	30.76% <ø> (ø)
mmedit/apis/matting_inference.py	19.51% <ø> (ø)
mmedit/apis/restoration_inference.py	16.66% <ø> (ø)
mmedit/apis/train.py	19.51% <0.00%> (-1.55%)	⬇️
mmedit/datasets/pipelines/loading.py	96.48% <ø> (ø)
...ones/encoder_decoders/decoders/deepfill_decoder.py	88.63% <ø> (ø)
.../backbones/encoder_decoders/decoders/gl_decoder.py	100.00% <ø> (ø)
...ones/encoder_decoders/decoders/indexnet_decoder.py	100.00% <ø> (ø)
...ckbones/encoder_decoders/decoders/pconv_decoder.py	28.12% <ø> (ø)
... and 65 more

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[hellock]

Is it tested?

[nbei]

Is it tested?

It's being tested on Tencent Cloud but suffering from low speed when downloading some packages.