ci(gitflow): Use personal access token to create PR

[mydea]

Otherwise, workflows will not be triggered due to security issues. See peter-evans/create-pull-request#48 for details.

This should also fix the self-approval issue.

Also fixes a typo in the workflow.

Also fixes a problem where the master->develop workflow is triggered on each PR closed, but then fails because no job is run. Now it will run an empty dummy-job.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.87 KB (+0.02% 🔺)
@sentry/browser - ES5 CDN Bundle (minified)	61.57 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.54 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified)	54.88 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	20.29 KB (0%)
@sentry/browser - Webpack (minified)	66.37 KB (0%)
@sentry/react - Webpack (gzipped + minified)	20.31 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	47.6 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	26.79 KB (-0.01% 🔽)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	25.08 KB (+0.01% 🔺)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	44.16 KB (+0.01% 🔺)
@sentry/replay - Webpack (gzipped + minified)	38.89 KB (0%)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	61.5 KB (+0.01% 🔺)