Robin pins followup

Marlin/src/pins/stm32f1/pins_MKS_ROBIN.h

@@ -173,11 +173,10 @@
    * MKS Robin has a few hardware revisions
    * https://github.com/makerbase-mks/MKS-Robin/tree/master/MKS%20Robin/Hardware
    *
-   * MKS Robin less or equal to V2.3 don't have SD_DETECT_PIN.
+   * MKS Robin <= V2.3 have no SD_DETECT_PIN.
+   * MKS Robin >= V2.4 have SD_DETECT_PIN on PF12.
    *
-   * MKS Robin greater or equal to V2.4 have SD_DETECT_PIN at PF12.
-   *
-   * You can uncomment it here, or you can add it SD_DETECT_PIN to your Configuration.h
+   * Uncomment here or add SD_DETECT_PIN to Configuration.h.
    */
   //#define SD_DETECT_PIN                   -1
   //#define SD_DETECT_PIN                   PF12  // SD_CD