fix pester syntax

tests/ChallengeFile/01_Test-ChallengeFile.Tests.ps1

@@ -25,6 +25,7 @@ Describe "Test-ChallengeFile" {
         It "No parameter and existing file should return true" {
             Test-ChallengeFile | Should -Be $true
         }
+    }
     Context "Execute with parameter" {
         $TestChFile = "{0}\resources\Challenge.bin" -f $RepoRoot
         It "Provide valid path" {
@@ -34,6 +35,4 @@ Describe "Test-ChallengeFile" {
             Test-ChallengeFile -Path "C:\notexisting.bin" | Should -Be $false
         }
     }
-
-    }
 }