[Fix][New_config] Fix demo bug

[HAOCHENYE]

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[fangyixiao18]

The other py file also need to be updated? such as https://github.com/open-mmlab/mmpretrain/blob/dev/mmpretrain/apis/feature_extractor.py#L86

[fangyixiao18]

check other files

[codecov]

Codecov Report

Patch coverage: 38.41% and project coverage change: -2.48 ⚠️

Comparison is base (f9dcae2) 68.16% compared to head (beba259) 65.69%.

❗ Current head beba259 differs from pull request most recent head 1cd769b. Consider uploading reports for the commit 1cd769b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1647      +/-   ##
==========================================
- Coverage   68.16%   65.69%   -2.48%     
==========================================
  Files         295      327      +32     
  Lines       23372    25515    +2143     
  Branches     3713     4068     +355     
==========================================
+ Hits        15932    16762     +830     
- Misses       6880     8141    +1261     
- Partials      560      612      +52     

Flag	Coverage Δ
unittests	65.69% <38.41%> (-2.48%)	⬇️

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

Impacted Files	Coverage Δ
mmpretrain/apis/feature_extractor.py	37.50% <0.00%> (ø)
mmpretrain/apis/image_caption.py	30.64% <0.00%> (ø)
mmpretrain/apis/image_retrieval.py	21.42% <0.00%> (ø)
mmpretrain/apis/visual_grounding.py	27.53% <0.00%> (ø)
mmpretrain/apis/visual_question_answering.py	25.67% <0.00%> (ø)
mmpretrain/datasets/__init__.py	63.41% <0.00%> (-10.88%)	⬇️
mmpretrain/datasets/gqa_dataset.py	0.00% <0.00%> (ø)
mmpretrain/datasets/nocaps.py	0.00% <0.00%> (ø)
mmpretrain/datasets/ocr_vqa.py	0.00% <0.00%> (ø)
mmpretrain/datasets/scienceqa.py	0.00% <0.00%> (ø)
... and 59 more

... and 1 file with indirect coverage changes

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