Fix Dependabot group names

[dolfinus]

Description

#1719 introduced grouping Dependabot PRs, but PR for different integration types were conbined to one group named github-actions.

Instead make different groups for different integration types.

Type of change

Please delete options that are not relevant.

• CI

Checklist

• My code adheres to the style guidelines of this project (scripts/lint.sh shows no errors)
• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• Both new and existing unit tests pass successfully on my local environment by running scripts/test-cov.sh
• I have ensured that static analysis tests are passing by running scripts/static-analysis.sh
• I have included code examples to illustrate the modifications