update table formatting

Author: renetapopova

modules/ROOT/pages/performance/vector-index-memory-configuration.adoc

@@ -27,7 +27,7 @@ If you use the vectors for further searching or refining search results, the pag
 The following examples show how to calculate the memory requirements when vectors are only used for searching and will not be returned to the user or application.
 
 .Disk storage requirements
-[cols="1,1,1"]
+[cols="h,1,1"]
 |===
 | Neo4j DB
 | 10M
@@ -43,7 +43,7 @@ The following examples show how to calculate the memory requirements when vector
 |===
 
 .Memory requirements
-[cols="1,1,1"]
+[cols="h,1,1"]
 |===
 | Heap
 | 10-20GB
@@ -63,7 +63,7 @@ The following examples show how to calculate the memory requirements when vector
 |===
 
 .Aura vector specified cluster memory configurations
-[cols="1,1,1,1,1"]
+[options="header", cols="1,1,1,1,1"]
 |===
 | Instance Size
 | Disk Storage
@@ -109,7 +109,7 @@ The following examples show how to calculate the memory requirements when vector
 |===
 
 .Aura non-vector specified cluster memory configurations
-[cols="1,1,1,1,1"]
+[options="header", cols="1,1,1,1,1"]
 |===
 | Instance Size
 | Disk Storage