fix: revert OAuth title to factual 'Configuring OAuth for Git providers'

SME feedback: JTBD title 'Give developers credential-free Git access'
is inaccurate (OAuth still uses credentials) and not findable for
admins searching for 'OAuth' or 'GitHub configuration'.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: gtrivedi88

modules/administration-guide/pages/configuring-oauth-for-git-providers.adoc

@@ -5,7 +5,7 @@
 // :page-aliases:
 
 [id="configuring-oauth-for-git-providers"]
-= Give developers credential-free Git access
+= Configuring OAuth for Git providers
 
 [NOTE]
 ====