Alejandro Butrón Pérez

chore:upgrade java8 to java21 for gaeinfo folder

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## Description Fixes # Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google. ## Checklist - [x] I have followed...

chore: upgrade firebase backend from java8 to java21

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## Description Fixes # Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google. ## Checklist - [x] I have followed...

chore:upgrade java8 to java21 for appidentity folder

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## Description ## Checklist - [ ] I have followed [Sample Format Guide](https://github.com/GoogleCloudPlatform/java-docs-samples/blob/main/SAMPLE_FORMAT.md) - [ ] `pom.xml` parent set to latest `shared-configuration` - [ ] Appropriate changes to README are...