[Fix]Fix pt version for merge stage test

[MeowZheng]

Motivation

The conflict is caused by:
The user requested torch==1.12.1+cpu
torchvision 0.13.0+cpu depends on torch==1.12.0

Modification

modify the torch==1.12.0+cpu

[codecov]

Codecov Report

Base: 83.33% // Head: 83.57% // Increases project coverage by +0.23% 🎉

Coverage data is based on head (1432bcc) compared to base (534b27b).
Patch coverage: 90.67% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2449      +/-   ##
===========================================
+ Coverage    83.33%   83.57%   +0.23%     
===========================================
  Files          143      144       +1     
  Lines         8127     8238     +111     
  Branches      1211     1226      +15     
===========================================
+ Hits          6773     6885     +112     
+ Misses        1165     1160       -5     
- Partials       189      193       +4     

Flag	Coverage Δ
unittests	83.57% <90.67%> (+0.23%)	⬆️

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

Impacted Files	Coverage Δ
mmseg/models/decode_heads/mask2former_head.py	89.83% <50.00%> (+0.17%)	⬆️
mmseg/models/decode_heads/maskformer_head.py	93.84% <50.00%> (+0.09%)	⬆️
mmseg/datasets/transforms/transforms.py	95.23% <88.31%> (-1.20%)	⬇️
mmseg/datasets/__init__.py	100.00% <100.00%> (ø)
mmseg/datasets/transforms/__init__.py	100.00% <100.00%> (ø)
mmseg/models/segmentors/__init__.py	100.00% <100.00%> (ø)
mmseg/models/segmentors/base.py	90.14% <100.00%> (+2.26%)	⬆️
mmseg/models/segmentors/seg_tta.py	100.00% <100.00%> (ø)
mmseg/models/backbones/timm_backbone.py	83.33% <0.00%> (+37.50%)	⬆️

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