Fix uppercase/lowercase mismatch in link

README.md

@@ -28,7 +28,7 @@ The Input Module has two 3.5mm Mono Input Jacks and two (On)-Off-On Switches tha
 
 | Top  | Bottom | 3D |
 | ---- | ------ | --- |
-| <img src="gerbers/MAMI-INPUT_Combined_Top.png" width="200px"> | <img src="gerbers/MAMI-INPUT_Combined_Bottom.png" width="200px"> | <img src="images/3D-input.png" width="200px"> |
+| <img src="gerbers/MAMI-INPUT_Combined_Top.png" width="200px"> | <img src="gerbers/MAMI-INPUT_Combined_Bottom.png" width="200px"> | <img src="images/3d-input.png" width="200px"> |
 
 ## 2x2 Tile Module [MAMI-QUAD]
 
@@ -36,7 +36,7 @@ Mixes two inputs onto two outputs using 4 Potentiometers.
 
 | Top | Bottom | 3D |
 | ---- | ----- | --- |
-| <img src="gerbers/MAMI-QUAD_Combined_Top.png" width="200px"> | <img src="gerbers/MAMI-QUAD_Combined_Bottom.png" width="200px"> | <img src="images/3D-quad.png" width="200px"> |
+| <img src="gerbers/MAMI-QUAD_Combined_Top.png" width="200px"> | <img src="gerbers/MAMI-QUAD_Combined_Bottom.png" width="200px"> | <img src="images/3d-quad.png" width="200px"> |
 
 ## Output Module [MAMI-OUTPUT]
 
@@ -44,5 +44,5 @@ Provides two 3.5mm Mono output jacks, with a Jumper (or switch) each row of tile
 
 | Top  | Bottom | 3D |
 | ---- | ------ | --- |
-| <img src="gerbers/MAMI-OUTPUT_Combined_Top.png" height="200px"> | <img src="gerbers/MAMI-OUTPUT_Combined_Bottom.png" height="200px"> | <img src="images/3D-output.png" height="200px"> |
+| <img src="gerbers/MAMI-OUTPUT_Combined_Top.png" height="200px"> | <img src="gerbers/MAMI-OUTPUT_Combined_Bottom.png" height="200px"> | <img src="images/3d-output.png" height="200px"> |