Update about_Hash_Tables.md

[SteveL-MSFT]

Added lines to help where a key name of keys collides with the keys property

Version(s) of document impacted

• Impacts 5.1 document
• Impacts 5.0 document
• Impacts 4.0 document
• Impacts 3.0 document

Reason(s) for not updating all version of documents

• The docuemnted feature was introduced in selected version (list version(s) here) of PowerShell
• This issue only shows up in selected version (list version(s) here) of the document
• This PR partially fixes the issue, and issue # tracks the remaining work

[saldana]

✅ Validation status: passed

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.

[SteveL-MSFT]

Updated description to be more generic and not just about keys based on feedback

[saldana]

✅ Validation status: passed

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.

[zjalexander]

Can I bother you about a few more things in this file since you're in here anyway? :)

key\/value 
Use an equal sign (\=) 

it looks like the slash is escaped, which shows up inconsistently on the web help but shows up correctly in get-help. Do you know if the escape is truly necessary for get-help?

Also, the last 3 links in the "See Also" section are broken. Would you mind fixing those as well?

If not, I'll just file an issue and get to it at some point.

Otherwise, this change looks fine to me.

[SteveL-MSFT]

@zjalexander I don't know if the escape character is needed. I'd suggest filing issues for the broken links. I was specifically addressing PowerShell/PowerShell#3176

[zjalexander]

#1074 opened