docs: fix broken links

- Remove dead GitHub Community forum link from README.md
- Fix banner image URL in GitHub Actions docs (remove /blog/ from path)

Author: JohannesHoppe

README.md

@@ -200,7 +200,7 @@ ng deploy --repo=https://github.com/<username>/<repositoryname>.git --name="Your
 
 > **ℹ️ Note for GitHub Actions**
 >
-> The `GITHUB_TOKEN` (installation access token) will only trigger a release of a new website if the action runs in a private repository. In a public repo, a commit is generated, but the site does not change. See this [GitHub Community post](https://github.community/t5/GitHub-Actions/GitHub-action-not-triggering-gh-pages-upon-push/m-p/26869) for more info. If your repo is public, you must still use the `GH_TOKEN` (personal access token).
+> The `GITHUB_TOKEN` (installation access token) will only trigger a release of a new website if the action runs in a private repository. In a public repo, a commit is generated, but the site does not change. If your repo is public, you must still use the `GH_TOKEN` (personal access token).
 
 ## 📦 Deployment Options <a name="options"></a>
 

docs/README_environment_github_actions.md

@@ -114,7 +114,7 @@ More info can be found here:
 
 Learn everything you need to know in the following extended article.
 
-[![Banner](https://angular-schule.github.io/website-articles/blog/2020-01-everything-github/everything-github.png)](https://angular.schule/blog/2020-01-everything-github)
+[![Banner](https://angular-schule.github.io/website-articles/2020-01-everything-github/everything-github.png)](https://angular.schule/blog/2020-01-everything-github)
 
 **Everything GitHub: Continuous Integration, Deployment and Hosting for your Angular App**