Improve IntelliSense handling of Test-SpfRecord.

The two internal-use-only parameters of Test-SpfRecord (the ones of
type [ref]) have been marked as "DontShow" and will now not be auto-
completed by IntelliSense.

They were already excluded from `Get-Help` as I was removing them
from platyPS's Markdown help files manually.

(Yes, I just learned about `[Parameter(DontShow)]`.  I suppose I am
one of today's lucky ten thousand.)

CHANGELOG.md

@@ -4,6 +4,7 @@
 - **NEW** The IP version checks are now displayed with an indentation when run as a part of `Test-MailPolicy`.
 - **FIX** The DMARC `fo` token is now parsed correctly when multiple values are present.
 - **FIX** The DMARC `rf` token is now parsed correctly.
+- **FIX** IntelliSense's handling of `Test-SpfRecord` has been improved by hiding some internal-use-only parameters.
 
 ## Version 1.3.0 (Tuesday, November 7, 2023)
 - **NEW** `Test-SpfRecord` can now recursively evaluate SPF records to count how many DNS lookups are performed when evaluating `redirect=` modifiers and `include:` tokens.  Use either `Test-SpfRecord -CountDnsLookups`, `Test-SpfRecord -Recurse`, or `Test-MailPolicy -CountSpfDnsLookups` to use this new mode.  Note that this overrides the new behavior introduced in version 1.2.0.

MailPolicyExplainer.psd1

@@ -167,10 +167,13 @@ PrivateData = @{
 		IconUri = 'https://raw.githubusercontent.com/rhymeswithmogul/MailPolicyExplainer/main/icon/PSGallery.png'
 
 		# ReleaseNotes of this module
-		ReleaseNotes = 'This release fixes many bugs and offers minor enhancements:
+		ReleaseNotes = 'This release adds one new feature: IP version checks are now indented when run from `Test-MailPolicy`.
+
+Many bugs were fixed, too:
 - The DMARC `fo` token is now parsed correctly when multiple values are present.
 - The DMARC `rf` token is now parsed correctly.
-- IP version checks are now indented when run from `Test-MailPolicy`.'
+- The IntelliSense handling of `Test-SpfRecord` has been improved by hiding some internal-use-only parameters.
+'
 
 	} # End of PSData hashtable
 

src/MailPolicyExplainer.psm1

@@ -946,8 +946,10 @@ Function Test-SpfRecord
 		[Alias('Recurse', 'CountSpfDnsLookups')]
 		[Switch] $CountDnsLookups,
 
+		[Parameter(DontShow)]
 		[ref] $Recursions,
 
+		[Parameter(DontShow)]
 		[ref] $DnsLookups
 	)