Adds the Java DMA example (#1789)

* adds the Java DMA example

* use tree link instead

* forgot closing > derp

Author: jasondaming

source/docs/software/examples-tutorials/wpilib-examples.rst

@@ -101,7 +101,7 @@ Miscellaneous Examples
 These examples demonstrate miscellaneous WPILib functionality that does not fit into any of the above categories.
 
 * **Addressable LED** (`Java <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/addressableled>`__, `C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/AddressableLED>`__): Demonstrates the use of the ``AddressableLED`` class to control RGB LEDs for robot decoration and/or driver feedback.
-* **DMA** (`C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/DMA>`__): Demonstrates the use of DMA (Direct Memory Access) to read from sensors without using the RoboRIO's CPU (C++ only).
+* **DMA** (`Java <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/dma/>`__, `C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/DMA>`__): Demonstrates the use of DMA (Direct Memory Access) to read from sensors without using the RoboRIO's CPU.
 * **HAL** (`C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/HAL>`__): Demonstrates the use of HAL (Hardware Abstraction Layer) without the use of the rest of WPILib. This example is for advanced users (C++ only).
 * **HID Rumble** (`Java <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/hidrumble>`__, `C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/HidRumble>`__): Demonstrates the use of the "rumble" functionality for tactile feedback on supported HIDs (such as XboxControllers).
 * **Shuffleboard** (`Java <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/shuffleboard>`__, `C++ <https://github.com/wpilibsuite/allwpilib/tree/main/wpilibcExamples/src/main/cpp/examples/ShuffleBoard>`__): Demonstrates configuring tab/widget layouts on the "Shuffleboard" dashboard from robot code through the ``Shuffleboard`` class's fluent builder API.