Issue #4279 Fix case sensitive WSL2 validation check

The WSL validation check assumes that the name "Microsoft" is
capitalized but this is not true in all cases.

Signed-off-by: Allain Legacy <[email protected]>

pkg/crc/preflight/preflight_checks_linux.go

@@ -36,7 +36,7 @@ func checkRunningInsideWSL2() error {
 		return err
 	}
 
-	if strings.Contains(string(version), "Microsoft") {
+	if strings.Contains(strings.ToLower(string(version)), "microsoft") {
 		logging.Debugf("Running inside WSL2 environment")
 		return fmt.Errorf("CRC is unsupported using WSL2")
 	}