tip: Update tip grammar a bit and rename example variable for clarity

src/PowerShellTips/2023-09-22-avoid-array-addition.ps1

@@ -2,30 +2,30 @@ $tip = [tiPS.PowerShellTip]::new()
 $tip.CreatedDate = [DateTime]::Parse('2023-09-22')
 $tip.Title = 'Avoid Array addition'
 $tip.TipText = @'
-Array addition is a expensive and inefficient operation and can, most of the times, be replaced by PowerShell explicit loop assignment.
+Array addition is an expensive and inefficient operation and can usually be replaced by PowerShell explicit loop assignment.
 
 Use a `List<T>` instead in those cases when adding to a collection while looping is required.
 '@
 $tip.Example = @'
 # Array addition:
-$result = @()
+$items = @()
 foreach ($i in 0..10) {
-    $result += $i
+    $items += $i
 }
 
-# Can be easily replaced with explicit assignemnt:
-$result = foreach ($i in 0..10) {
+# Can be easily replaced with explicit assignment:
+$items = foreach ($i in 0..10) {
     $i
 }
 
 # And, when not possible, a List<T> is recommended:
-$result = [System.Collections.Generic.List[int]]::new()
+$items = [System.Collections.Generic.List[int]]::new()
 foreach ($i in 0..10) {
-    $result.Add($i)
+    $items.Add($i)
 }
 '@
 $tip.Urls = @(
 	'https://learn.microsoft.com/en-us/powershell/scripting/dev-cross-plat/performance/script-authoring-considerations?view=powershell-7.3#array-addition'
 )
-$tip.MinPowerShellVersion = '5.1'
-$tip.Category = [tiPS.TipCategory]::Other # Community, CoreCmdlet, Editor, Module, Syntax, Terminal, or Other.
+$tip.MinPowerShellVersion = '0.0'
+$tip.Category = [tiPS.TipCategory]::Syntax # Community, CoreCmdlet, Editor, Module, Syntax, Terminal, or Other.