fix(comp:spin): spin container blured opacity should be 0.3

[sallerli1]

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• The commit message follows our guidelines
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What is the current behavior?

加载中的容器透明度为0.7

What is the new behavior?

应当是不透明度是0.7，即透明度0.3

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[cr-gpt]

The code patch is used to change the value of the opacity from 0.7 to 0.3 for the &-blur class.

It looks like there are no bugs in the code patch, but there may be potential risks with making this change. Depending on how and where the &-blur class is used, a lower opacity might affect the user experience negatively. For example, if it is used on text, it could be hard to read. It's important to test out the changes to make sure they don't negatively impact the user experience.

Another suggestion is to use a variable to store the opacity value, so that it can easily be changed if needed. This way, you won't have to search through the codebase to find the class when you need to adjust the opacity.

[codecov]

Codecov Report

Merging #1464 (439712d) into main (f870a84) will not change coverage.
The diff coverage is n/a.

❗ Current head 439712d differs from pull request most recent head afe0252. Consider uploading reports for the commit afe0252 to get more accurate results

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