📝 Update config URLs (#26049)

Marlin/Configuration_adv.h

@@ -190,7 +190,7 @@
 
 /**
  * Hephestos 2 24V heated bed upgrade kit.
- * https://store.bq.com/en/heated-bed-kit-hephestos2
+ * https://www.en3dstudios.com/product/bq-hephestos-2-heated-bed-kit/
  */
 //#define HEPHESTOS2_HEATED_BED_KIT
 #if ENABLED(HEPHESTOS2_HEATED_BED_KIT)
@@ -3426,7 +3426,7 @@
   //#define PHOTOGRAPH_PIN 23
 
   // Canon Hack Development Kit
-  // https://captain-slow.dk/2014/03/09/3d-printing-timelapses/
+  // https://web.archive.org/web/20200920094805/https://captain-slow.dk/2014/03/09/3d-printing-timelapses/
   //#define CHDK_PIN        4
 
   // Optional second move with delay to trigger the camera shutter
@@ -4028,7 +4028,7 @@
  * Wiki: https://wiki.aus3d.com.au/Magnetic_Encoder
  * Github: https://github.com/Aus3D/MagneticEncoder
  *
- * Supplier: https://aus3d.com.au/magnetic-encoder-module
+ * Supplier: https://aus3d.com.au/products/magnetic-encoder-module
  * Alternative Supplier: https://reliabuild3d.com/
  *
  * Reliabuild encoders have been modified to improve reliability.
@@ -4299,7 +4299,7 @@
   /**
    * Using a sensor like the MMU2S
    * This mode requires a MK3S extruder with a sensor at the extruder idler, like the MMU2S.
-   * See https://help.prusa3d.com/en/guide/3b-mk3s-mk2-5s-extruder-upgrade_41560, step 11
+   * See https://help.prusa3d.com/guide/3b-mk3s-mk2-5s-extruder-upgrade_41560#42048, step 11
    */
   #if HAS_PRUSA_MMU2S
     #define MMU2_C0_RETRY   5             // Number of retries (total time = timeout*retries)