Fix typos in 5.1 topics (#11119)

Author: sdwheeler

reference/5.1/Microsoft.PowerShell.Core/About/about_Execution_Policies.md

@@ -1,7 +1,7 @@
 ---
 description: Describes the PowerShell execution policies and explains how to manage them.
 Locale: en-US
-ms.date: 03/04/2024
+ms.date: 05/16/2024
 no-loc: [Bypass, Default, Restricted, Undefined, Unrestricted, Process, Scope, MachinePolicy, about_Group_Policy_Settings]
 online version: https://learn.microsoft.com/powershell/module/microsoft.powershell.core/about/about_execution_policies?view=powershell-5.1&WT.mc_id=ps-gethelp
 schema: 2.0.0
@@ -268,7 +268,7 @@ policy.
 For example:
 
 ```powershell
-pwsh.exe -ExecutionPolicy AllSigned
+powershell.exe -ExecutionPolicy AllSigned
 ```
 
 The execution policy that you set isn't stored in the registry. Instead, it's
@@ -329,7 +329,7 @@ evaluates the execution policies in the following precedence order:
 ```
 Group Policy: MachinePolicy
 Group Policy: UserPolicy
-Execution Policy: Process (or pwsh.exe -ExecutionPolicy)
+Execution Policy: Process (or powershell.exe -ExecutionPolicy)
 Execution Policy: LocalMachine
 Execution Policy: CurrentUser
 ```

reference/5.1/Microsoft.PowerShell.Core/About/about_Functions.md

@@ -1,7 +1,7 @@
 ---
 description: Describes how to create and use functions in PowerShell.
 Locale: en-US
-ms.date: 03/12/2024
+ms.date: 05/16/2024
 online version: https://learn.microsoft.com/powershell/module/microsoft.powershell.core/about/about_functions?view=powershell-5.1&WT.mc_id=ps-gethelp
 schema: 2.0.0
 title: about Functions
@@ -38,8 +38,8 @@ output returned from your function. However, the `return` keyword exits the
 function at that line. For more information, see [about_Return][16].
 
 The function's statement list can contain different types of statement lists
-with the keywords `begin`, `process`, `end`, and `clean`. These statement lists
-handle input from the pipeline differently.
+with the keywords `begin`, `process`, and `end`. These statement lists handle
+input from the pipeline differently.
 
 The [filter][04] keyword is used to create a type of function that runs on each
 object in the pipeline. A filter resembles a function with all its statements
@@ -138,7 +138,7 @@ For more information, see [about_Automatic_Variables][15].
   that reaches the function.
 - If the pipeline input that reaches the function is empty, the `process` block
   **does not** execute.
-  - The `begin`, `end`, and `clean` blocks still execute.
+  - The `begin` and `end` blocks still execute.
 
 > [!IMPORTANT]
 > If a function parameter is set to accept pipeline input, and a `process`