Update README and CONTRIBUTING files

Author: nodeg

CONTRIBUTING.md

@@ -5,7 +5,7 @@
 To develop tetra, you will need:
 
 * to install Bundler and Ruby development headers. On SUSE distros, use
-  `sudo zypper install ruby3.1-rubygem-bundler ruby-devel`;
+  `sudo zypper install ruby3.4-rubygem-bundler ruby3.4-devel`;
 * to get development dependencies: `bundle install`;
 
 To install a development version of tetra use:
@@ -14,8 +14,8 @@ To install a development version of tetra use:
 sudo rake install
 ```
 
-To run tests, simply run `rake`. Please note that tests are divided into fine (more similar to unit tests) and coarse
-(more similar to integration tests).
+To run tests, simply run `rake` or `bundle exec rake`. Please note that tests are divided into fine
+(more similar to unit tests) and coarse (more similar to integration tests).
 
 ## Coding style
 

README.md

@@ -35,7 +35,7 @@ rake install
 
 Test can be found in the `spec/` folder and are divided into fine (more similar to unit tests) and coarse
 (more similar to integration tests).
-To run tests manually, simply execute `rake`.
+To run tests manually, simply execute `rake` or `bundle exec rake`.
 With every Pull Request against master and consecutive pushes to that PR, several [GitHub Actions tests](https://github.com/uyuni-project/tetra/tree/master/.github/workflows)
 will run automatically.