Call variable under a PS script as a parameter in Jenkins

I have a config.ps1 script which has a variable "$versionNumber = “1.0.0"”. I need enter the variable value of users choice and save the config.ps1 file. I need to do this task using Jenkins Parameter.

My config.ps1 script.

# Pack parameters used to create the .nupkg file.

# Specify the Version Number to use for the NuGet package. If not specified, the version number of the assembly being packed will be used.
# NuGet version number guidance: and the Semantic Versioning spec:
# e.g. "" (use assembly's version), "1.2.3" (stable version), "1.2.3-alpha" (prerelease version).
$versionNumber = "1.0.0"

# Specify any Release Notes for this package. 
# These will only be included in the package if you have a .nuspec file for the project in the same directory as the project file.
$releaseNotes = ""

# Specify a specific Configuration and/or Platform to only create a NuGet package when building the project with this Configuration and/or Platform.
#   e.g. $configuration = "Release"
#        $platform = "AnyCPU"
$configuration = ""
$platform = ""

My approach-

Get-Content c:\config.ps1 | ForEach-Object { $_ -replace "$versionNumber = "1.0.0"", "$versionNumber = "$env:version_number" }

You can use the Jenkins environment variable directly in the config script.

$versionNumber = "$($env: environment_variable)"