add troubleshooting of error "Resource not accessible by integration" in create-best-of-list.md

[matan-h]

Describe the issue:
when I try to create a best-of list, I get Error:Resource not accessible by integration at running action-create-branch.
here the pipeline.
I fixed it by go to github Actions general settings,chenge Workflow permissions from default Read repository contents permission to Read and write permissions (I dont know if this was necessary) and check Allow GitHub Actions to create and approve pull requests.

the default was

maybe you can add a troubleshooting section it to create-best-of-list.md.

[fkromer]

@matan-h You need to allow GitHub Actions to create pull requests in addition (https://github.com/fkromer/best-of-pydantic/actions/runs/4091424932/jobs/7056121856#step:7:72) otherwise setup-best-of-list does not create the PR. As workaround you can create a PR yourself from the created branch "setup". I tried to fix it with this settings:

However the following setup job failed explicitly then: https://github.com/fkromer/best-of-pydantic/actions/runs/4091868272 . Probably there is need for defining permissions explicitly in the workflow (YAML file).