Update sample app and Help page URLs

Author: mhartl

HELP.md

@@ -4,14 +4,14 @@ This is the Help page for the [*Ruby on Rails Tutorial*](https://www.railstutori
 
 ## General suggestions
 
-Web development is a tricky business, and despite our collective best efforts it’s likely that you’ll run into trouble at some point. If you do, I suggest comparing your code to the [reference implementation of the sample app](https://github.com/learnenough/sample_app_7th_ed) to track down any discrepancies. You can also post your question at [Stack Overflow](https://stackoverflow.com/), but I suggest you do so after trying all the debugging tips listed below.
+Web development is a tricky business, and despite our collective best efforts it’s likely that you’ll run into trouble at some point. If you do, I suggest comparing your code to the [reference implementation of the sample app](https://github.com/learnenough/rails_tutorial_sample_app_7th_ed) to track down any discrepancies. You can also post your question at [Stack Overflow](https://stackoverflow.com/), but I suggest you do so after trying all the debugging tips listed below.
 
 ## Debugging tips
 
 While it’s impossible to anticipate every potential problem, here are
 some debugging tips that might help:
 
-- Have you compared your code to the [reference implementation of the sample app](https://github.com/mhartl/sample_app_7th_ed)?
+- Have you compared your code to the [reference implementation of the sample app](https://github.com/mhartl/rails_tutorial_sample_app_7th_ed)?
 - Are you using the [exact gem versions](https://gemfiles-7th-ed.railstutorial.org) (including Rails) used in the
   tutorial?
 - Did you try Googling the error message?
@@ -42,5 +42,5 @@ Raymond](http://www.catb.org/esr/).
 
 ## Error reports
 
-Suspected errors, typos, and bugs can be emailed to <support@learnenough.com>. All such reports are gratefully received, but please double-check with the [online version of the tutorial](https://www.railstutorial.org/book) and the [reference implementation](https://github.com/learnenough/sample_app_7th_ed) before submitting.
+Suspected errors, typos, and bugs can be emailed to <michael@learnenough.com>. All such reports are gratefully received, but please double-check with the [online version of the tutorial](https://www.railstutorial.org/book) and the [reference implementation](https://github.com/learnenough/rails_tutorial_sample_app_7th_ed) before submitting.
 

README.md

@@ -130,6 +130,6 @@ $ git checkout sign-up
 
 ## Help with the Rails Tutoiral
 
-Experience shows that comparing code with the reference app is often helpful for debugging errors and tracking down discrepancies. For additional assistance with any issues in the tutorial, please consult the [Rails Tutorial Help page](https://www.railstutorial.org/help).
+Experience shows that comparing code with the reference app is often helpful for debugging errors and tracking down discrepancies. For additional assistance with any issues in the tutorial, please consult the [Rails Tutorial Help page](https://github.com/learnenough/rails_tutorial_sample_app_7th_ed/blob/main/HELP.md).
 
-Suspected errors, typos, and bugs can be emailed to <support@learnenough.com>. All such reports are gratefully received, but please double-check with the [online version of the tutorial](https://www.railstutorial.org/book) and this reference app before submitting.
+Suspected errors, typos, and bugs can be emailed to <michael@learnenough.com>. All such reports are gratefully received, but please double-check with the [online version of the tutorial](https://www.railstutorial.org/book) and this reference app before submitting.