May I suggest you to use the groups feature in dependabot?
https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#groups
This could reduce the number of PRs
You can have a look at what was done in this repository when I suggested it
Zxilly/go-size-analyzer@ec9c028