[TASK] Change indentation in Settings.yaml.example (Revision 1)

This change updates the indentation in Settings.yaml.example
to make it more clear how to uncomment the phpBinaryPathAndFilename
lines.

Change-Id: I396978ba30036c8b6b0f109ec2af6b9eaff47f2b
Resolves: #54570
Releases: master
Revision-Id: c687ee529a1ea0df0f6d3a5a3918855b82525985