TELCODOCS-2291: Removing index anchor for index.adoc in S&P assembly as it confuses the DRK single-page view

Author: rohennes

scalability_and_performance/index.adoc

@@ -1,5 +1,5 @@
 :_mod-docs-content-type: ASSEMBLY
-[id="index"]
+[id="scalability-and-performance-overview"]
 = {product-title} scalability and performance overview
 include::_attributes/common-attributes.adoc[]
 :context: index

welcome/learn_more_about_openshift.adoc

@@ -200,7 +200,7 @@ a|* xref:../operators/understanding/crds/crd-extending-api-with-crds.adoc#crd-cr
 | xref:../cicd/builds/advanced-build-operations.adoc#builds-build-pruning-advanced-build-operations[Performing advanced builds]
 
 | xref:../scalability_and_performance/recommended-performance-scale-practices/recommended-infrastructure-practices.adoc#scaling-cluster-monitoring-operator[Scale] and xref:../scalability_and_performance/using-node-tuning-operator.adoc#using-node-tuning-operator[tune] clusters
-| xref:../scalability_and_performance/index.adoc#index[{product-title} scalability and performance]
+| xref:../scalability_and_performance/index.adoc#scalability-and-performance-overview[{product-title} scalability and performance]
 
 |===