Update docs/github-app.adoc

Co-authored-by: Devin Nusbaum <dwnusbaum@users.noreply.github.com>

Author: jeromepochat

docs/github-app.adoc

@@ -172,8 +172,7 @@ The following default permissions strategies are available:
 ===== Jobs using plain Git
 
 The inference-based modes for GitHub App Credentials are supported for Organization Folders and Multibranch Pipelines only. There are not supported in other contexts using plain Git such as:
-* Pipeline script from SCM
-* Standalone Pipeline
+* Standalone Pipeline jobs using "Pipeline script from SCM"
 * Freestyle jobs
 
 ===== Pipeline libraries