Code comment only change

(cherry picked from commit 0767a9d4d7)

solr/core/src/java/org/apache/solr/search/facet/FacetFieldProcessorByArrayDV.java

@@ -324,6 +324,8 @@ class FacetFieldProcessorByArrayDV extends FacetFieldProcessorByArray {
     int ord = (toGlobal != null && segOrd >= 0) ? (int)toGlobal.get(segOrd) : segOrd;
 
     int arrIdx = ord - startTermIndex;
+    // This code handles faceting prefixes, which narrows the range of ords we want to collect.
+    // It’s not an error for an ord to fall outside this range… we simply want to skip it.
     if (arrIdx >= 0 && arrIdx < nTerms) {
       countAcc.incrementCount(arrIdx, 1);
       if (collectAcc != null) {