Update CreateWorkflowDispatch method

github/create-release.ps1

@@ -62,7 +62,6 @@ function Validate-ReleaseAvailability {
             Write-Host "Release was successfully created: $($createdRelease.html_url)"
             return
         }
-        $RetryCount
 
         $RetryCount--
         Start-Sleep -Seconds $RetryIntervalSec

github/github-api.psm1

@@ -103,14 +103,17 @@ class GitHubApi
         return $this.InvokeRestMethod($url, 'GET', $null, $null)
     }
 
-    [void] CreateWorkflowDispatch([string]$WorkflowFileName, [string]$Ref, [object]$Inputs) {
+    [void] CreateWorkflowDispatch([string]$WorkflowFileName, [string]$Ref, [string]$Inputs) {
         $url = "actions/workflows/${WorkflowFileName}/dispatches"
-        $body = @{
+        $body = @{ ref = $Ref }
-            ref = $Ref
+        
-            inputs = $Inputs
+        if ($Inputs) {
-        } | ConvertTo-Json
+            $body.inputs = $Inputs
+        }
 
-        $this.InvokeRestMethod($url, 'POST', $null, $body)
+        $jsonBody = $body | ConvertTo-Json
+
+        $this.InvokeRestMethod($url, 'POST', $null, $jsonBody)
     }
 
     [string] hidden BuildUrl([string]$Url, [string]$RequestParams) {