Use HTTPS for links in main Readme

Manually tested that links support HTTPS

Author: bergmeister

README.md

@@ -31,14 +31,14 @@ The design goal is to create a framework specific to powershell scripting in gen
   - Automatically rotate old or too large logs
 
 ## More guidance
-All of the upcoming documentation will also be hosted at the [official PSFramework website](http://psframework.org), existing documentation shall be copied to also be available there.
+All of the upcoming documentation will also be hosted at the [official PSFramework website](https://psframework.org), existing documentation shall be copied to also be available there.
 
-The PSFramework project has a related slack community, where everybody is free to join, ask questions or discuss practices. For a free invite, check our [Contact](http://psframework.org/general/contact.html) page
+The PSFramework project has a related slack community, where everybody is free to join, ask questions or discuss practices. For a free invite, check our [Contact](https://psframework.org/general/contact.html) page
 
 The PSFramework comes with lots of internal documentation.
 All functions ship with help and examples and there are quite a few concept help articles:
 ```powershell
 Get-Help about_psf*
 ```
 (Note: Some of them are not quite done yet)
-Finally, I also like to [write in my blog](http://allthingspowershell.blogspot.de) about the PSFramework and all my other projects.
+Finally, I also like to [write in my blog](https://allthingspowershell.blogspot.de) about the PSFramework and all my other projects.