Fix grammar and match form of similar questions

doc/faqs/how-to-install-composer-programmatically.md → doc/faqs/how-do-i-install-composer-programmatically.md

@@ -1,4 +1,4 @@
-# How to install Composer programmatically?
+# How do I install Composer programmatically?
 
 As noted on the download page, the installer script contains a
 signature which changes when the installer code changes and as such