Merge pull request #361 from jhonndabi/fix/readme-elixir-release-conf…

…ig-instructions

fix: readme elixir release config instructions

README.md

@@ -76,7 +76,7 @@ def project do
   [
     releases: [
       my_instrumented_release: [
-        applications: [:runtime_tools, :opentelemetry_exporter, {:opentelemetry, :temporary}, :my_instrumented_app]
+        applications: [opentelemetry_exporter: :permanent, opentelemetry: :temporary]
       ],
 
       ...