Fix documentation links in README files for (#236)

Fixes:
- nrfx-blink-sdk
- rpi-pico-blink-sdk
- rpi-pico-lldb
- rpi-picow-blink-sdk

Author: tscholze

nrfx-blink-sdk/README.md

@@ -1,3 +1,3 @@
 # nrfx-blink-sdk
 
-See [Blinking an LED on Nordic nRF with Zephyr](https://docs.swift.org/embedded/documentation/embedded/nrfxblinkguide) for documentation on this example.
+See [Blinking an LED on Nordic nRF with Zephyr](https://docs.swift.org/embedded/documentation/embedded/nrfblinkguide for documentation on this example.

rpi-pico-blink-sdk/README.md

@@ -1,3 +1,3 @@
 # rpi-pico-blink-sdk
 
-See [Blinking an LED on the Raspberry Pi Pico with the Pico SDK](https://docs.swift.org/embedded/documentation/embedded/picoguide) for documentation on this example.
+See [Blinking an LED on the Raspberry Pi Pico with the Pico SDK](https://docs.swift.org/embedded/documentation/embedded/integratewithpico/) for documentation on this example.

rpi-pico-lldb/README.md

@@ -1,5 +1,5 @@
 # rpi-pico-lldb
-The sample code used in the [Trying out LLDB debugging on Raspberry Pi Pico](https://docs.swift.org/embedded/documentation/embedded/lldbguide) Guided Example.
+The sample code used in the [Trying out LLDB debugging on Raspberry Pi Pico](https://docs.swift.org/embedded/documentation/embedded/svd2lldbguide) Guided Example.
 
 ## Prerequisites
 - Install **Swift with Embedded support**, **LLDB**, and **SVD2LLDB**.

rpi-picow-blink-sdk/README.md

@@ -1,3 +1,3 @@
 # rpi-picow-blink-sdk
 
-See [Blinking an LED in Morse code on the Raspberry Pi Pico W with the Pico SDK](https://docs.swift.org/embedded/documentation/embedded/picowblinkguide) for documentation on this example.
+See [Blinking an LED in Morse code on the Raspberry Pi Pico W with the Pico SDK](https://docs.swift.org/embedded/documentation/embedded/rpipicowblinkguide) for documentation on this example.