Additional link fixes

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

docs/_summary.md

@@ -52,7 +52,7 @@
   * [Backlight](feature_backlight.md)
   * [Bluetooth](feature_bluetooth.md)
   * [Bootmagic](feature_bootmagic.md)
-  * [Combos](feature_combo)
+  * [Combos](feature_combo.md)
   * [Command](feature_command.md)
   * [Debounce API](feature_debounce_type.md)
   * [Dynamic Macros](feature_dynamic_macros.md)
@@ -66,7 +66,7 @@
   * [LED Matrix](feature_led_matrix.md)
   * [Macros](feature_macros.md)
   * [Mouse Keys](feature_mouse_keys.md)
-  * [OLED Driver](feature_oled_driver)
+  * [OLED Driver](feature_oled_driver.md)
   * [One Shot Keys](feature_advanced_keycodes.md#one-shot-keys)
   * [Pointing Device](feature_pointing_device.md)
   * [PS/2 Mouse](feature_ps2_mouse.md)