Bump graphql-playground-html from 1.6.19 to 1.6.25
Bump graphql-playground-html from 1.6.19 to 1.6.25

Bumps [graphql-playground-html](https://github.com/graphcool/graphql-playground) from 1.6.19 to 1.6.25.
- [Release notes](https://github.com/graphcool/graphql-playground/releases)
- [Commits](https://github.com/graphcool/graphql-playground/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
sendgrid/docs,Whatthefoxsays/docs,sendgrid/docs,sendgrid/docs,Whatthefoxsays/docs,Whatthefoxsays/docs