revert file rename

Author: craigshoemaker

articles/sre-agent/pagerduty-indexing.md …s/sre-agent/set-up-pagerduty-indexing.mdarticles/sre-agent/pagerduty-indexing.md renamed to articles/sre-agent/set-up-pagerduty-indexing.md articles/sre-agent/pagerduty-indexing.md renamed to articles/sre-agent/set-up-pagerduty-indexing.md

@@ -153,7 +153,7 @@ items:
           - name: Set up an incident trigger
             href: response-plan.md
           - name: Set up PagerDuty indexing
-            href: pagerduty-indexing.md
+            href: set-up-pagerduty-indexing.md
           - name: Set up ServiceNow indexing
             href: setup-servicenow-indexing.md
           - name: Manage permissions