[crc-support] fix: windows aSHAName param wrong default value

Signed-off-by: Adrian Riobo <[email protected]>

crc-support/oci/lib/windows/run.ps1

@@ -1,19 +1,10 @@
-aBaseURL=''
-aName=''
-aSHAName='sha256sum.txt'
-targetPath=''
-freshEnv='true'
-download='true'
-install='false'
-
-
 param(
     [Parameter(HelpMessage='download base url')]
     $aBaseURL,
     [Parameter(HelpMessage='asset name to be downloaded')]
     $aName,
     [Parameter(HelpMessage='shasumFile file name Default value: sha256sum.txt')]
-    $aSHAName="sha256sum.txt",
+    $aSHAName='sha256sum.txt',
     [Parameter(Mandatory,HelpMessage='target folder for download')]
     $targetPath,
     [Parameter(HelpMessage='force fresh, remove any previous existing instance for crc. Default False')]