fixup: example build folder

Author: chris-durand

examples/nucleo_h755zi-q/blink/cm4/project.xml

@@ -1,7 +1,7 @@
 <library>
   <extends>modm:nucleo-h755zi-q</extends>
   <options>
-    <option name="modm:build:build.path">../../../build/nucleo_h755zi-q/blink_cm4</option>
+    <option name="modm:build:build.path">../../../../build/nucleo_h755zi-q/blink_cm4</option>
     <option name="modm:target">stm32h755zit6@m4</option>
   </options>
   <modules>

examples/nucleo_h755zi-q/blink/cm7/project.xml

@@ -1,7 +1,7 @@
 <library>
   <extends>modm:nucleo-h755zi-q</extends>
   <options>
-    <option name="modm:build:build.path">../../../build/nucleo_h755zi-q/blink_cm7</option>
+    <option name="modm:build:build.path">../../../../build/nucleo_h755zi-q/blink_cm7</option>
     <option name="modm:target">stm32h755zit6@m7</option>
   </options>
   <modules>