Fix logging setup in readme (#3)

* Fix logging setup in readme

* Add runtests and package usage

README.md

@@ -7,11 +7,25 @@ Utilities for working within GitHub Actions, modelled after [`actions/core`](htt
 
 Perhaps the most common use case is to set the global logger to one compatible with GitHub Actions' log format:
 
+### Inside the package
+```
+using Logging: global_logger
+using GitHubActions: GitHubActionsLogger
+function __init__()
+    # Using GitHubActions logger in CI
+    get(ENV, "GITHUB_ACTIONS", "false") == "true" && global_logger(GitHubActionsLogger())
+end
+```
+
+### Inside the runtests
 ```jl
 using Logging: global_logger
 using GitHubActions: GitHubActionsLogger
+# Using GitHubActions logger in CI
 get(ENV, "GITHUB_ACTIONS", "false") == "true" && global_logger(GitHubActionsLogger())
 @warn "This warning will be visible in your GitHub Actions logs!"
 ```
 
+
+
 For information on the other provided functions, see the documentation.