Fix Endstop Interrupts with SPI endstops, sanity checks (#20051)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/module/endstops.cpp

@@ -899,6 +899,9 @@ void Endstops::update() {
         hit = true;
       }
     #endif
+
+    if (TERN0(ENDSTOP_INTERRUPTS_FEATURE, hit)) update();
+
     return hit;
   }