[Keyboard] The Uni change folder location (#19326)

Co-authored-by: Peter Park <peter@Peters-MacBook-Air.local>

keyboards/stenokeyboards/the_uni/rp_2040/readme.md

@@ -0,0 +1,25 @@
+# Uni v4
+
+![Uni v4](https://i.imgur.com/HyvMu26h.png)
+
+-   Hardware Supported:
+    -   The Uni v4
+-   Hardware Availability: [https://www.stenokeyboards.com](https://www.stenokeyboards.com)
+-   Uses the rp2040 chip
+
+Make the .uf2 file by doing:
+
+# Bootloader
+
+Enter the bootloader by:
+
+-   **Physical boot button**:
+    -   First, unplug the Uni v4.
+    -   Then press and hold the button on the back of the PCB marked "B" while you plug in the keyboard. This will create register the keyboard as a storage device on the computer.
+    -   Copy and paste the .uf2 file in the top directory of the device. Once done, it will automatically reboot the keyboard.
+
+Make examples for this keyboard (after setting up your build environment):
+
+    qmk compile -kb stenokeyboards/the_uni/rp_2040 -km default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).