Updates to PowerShell help docs (#4781)

- [x] I have signed the [Contributor License
Agreement](https://cla.opensource.microsoft.com/microsoft/winget-pkgs).
- [x]  This pull request is related to an issue
	- Closes #4773


Each change is broken into a separate commit to help with reviewing.
Changes include:
- Couple more examples for cmdlets
- Linter fixes. Majority of them involve newline after a heading &
code-fenced blocks wanting a language tag

###### Microsoft Reviewers: [Open in
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src/PowerShell/Help/Microsoft.WinGet.Client/Get-WinGetPackage.md

@@ -24,7 +24,7 @@ Get-WinGetPackage [-Tag <String>] [-Command <String>] [-Count <UInt32>] [-Id <St
 
 This command lists all of the packages installed on your system. The output includes packages
 installed from WinGet sources and packages installed by other methods. Packages that have package
-identifiers starting with `MSIX` or `ARP` were not installed from a WinGet source.
+identifiers starting with `MSIX` or `ARP` could not be correlated to a WinGet source.
 
 ## EXAMPLES
 
@@ -36,6 +36,31 @@ Get-WinGetPackage
 
 This example shows how to list all packages installed on your system.
 
+### Example 2: Get package by Id
+
+```powershell
+Get-WinGetPackage -Id "Microsoft.PowerShell"
+```
+
+This example shows how to get an installed package by its package identifier.
+
+### Example 3: Get package(s) by name
+
+```powershell
+Get-WinGetPackage -Name "PowerShell"
+```
+
+This example shows how to get installed packages that match a name value. The command does a substring comparison of the provided name with
+installed package names.
+
+### Example 4: List all packages with an available update
+
+```powershell
+Get-WinGetPackage | Where-Object IsUpdateAvailable
+```
+
+This example shows how to list all packages that have an available upgrade from one of the configured sources.
+
 ## PARAMETERS
 
 ### -Command

src/PowerShell/Help/Microsoft.WinGet.Client/Update-WinGetPackage.md

@@ -81,6 +81,14 @@ This example shows how to update a specific version of a package using a query.
 query search for packages matching `Microsoft.PowerShell`. The results of the search a limited to
 matches with the version of `7.4.4.0`.
 
+### Example 5: Update all packages
+
+```powershell
+Get-WinGetPackage | Where-Object IsUpdateAvailable | Update-WinGetPackage
+```
+
+This example shows how to update all packages that have an available upgrade from one of the configured sources.
+
 ## PARAMETERS
 
 ### -AllowHashMismatch