Undocumented softwareName parameter in package function examples

### What You Are Seeing?
The online documentation for multiple Chocolatey PowerShell packaging functions include examples referencing a `softwareName` parameter that isn't explained in those functions' documentation.

At a minimum, the following documentation pages are affected:
https://docs.chocolatey.org/en-us/create/functions/install-chocolateypackage
https://docs.chocolatey.org/en-us/create/functions/install-chocolateyinstallpackage

This implies that there is either an undocumented `softwareName` parameter supported by these functions, or that the examples confusingly include use of unsupported parameters.

### What is Expected?
All supported parameters should be documented.
No example should depict use of unsupported parameters.

### How Did You Get This To Happen? (Steps to Reproduce)
Consulted URLs above.

### Output Log

Full Log Output

~~~sh
N/A
~~~