🐛 Spellcheck comments (#22496)

codespell -q 3 --builtin=clear,rare,informal,code -S ./Marlin/src/lcd/language -L alo,amin,endcode,stdio,uint

Marlin/src/HAL/STM32/msc_sd.cpp

@@ -60,7 +60,7 @@ public:
       return true;
     }
 
-    // multi block optmization
+    // multi block optimization
     sd2card->writeStart(blkAddr, blkLen);
     while (blkLen--) {
       watchdog_refresh();
@@ -80,7 +80,7 @@ public:
       return true;
     }
 
-    // multi block optmization
+    // multi block optimization
     sd2card->readStart(blkAddr);
     while (blkLen--) {
       watchdog_refresh();