when use spring-cloud-alibaba-dependencies2021.1 and spring-boot-dependencies2.4.2, bootstrap.properties key value pair can't use @value getget

[gitchong]

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Which Component nacos config

Describe the bug when use spring-cloud-alibaba-dependencies2021.1 and spring-boot-dependencies2.4.2, test nacos config , in bootstrap.properties, define key value pair k1=v1, when use @Value("${k1}") get the value, java.lang.IllegalArgumentException: Could not resolve placeholder 'k1' in value "${k1}"

when use spring-cloud-alibaba-dependencies2.2.2.RELEASE and spring-boot-dependencies2.3.7.RELEASE, it run correct。 but in wiki doc suggest spring-cloud-alibaba-dependencies2021.1 and spring-boot-dependencies2.4.2 To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior Correct injection value， can get value from bootstrap.properties

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Additional context Add any other context about the problem here. e.g. MacOS 、Java8 、 Version 0.2.1.RELEASE