Fix typo

Author: jmh530

.github/workflows/ci.yml

@@ -218,7 +218,7 @@ jobs:
             if ($env:DC_NAME -like "dmd.*") {
                 dmd --version 2>$null
                 if ($LASTEXITCODE -ne 0) { "dmd not found"; exit 1 }
-            } else if ($env:DC_NAME -like "ldc.*") {
+            } elseif ($env:DC_NAME -like "ldc.*") {
                 ldc2 --version 2>$null
                 if ($LASTEXITCODE -ne 0) { "dmd not found"; exit 1 }
             } else {