doc: update pyOCD repository links

The repository has been moved to a new organization, see
https://pyocd.io/. Update links to the pyOCD repository.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
(cherry picked from commit 617b71bc174be034b6b910792ea922c47b568068)
diff --git a/boards/96boards/nitrogen/doc/index.rst b/boards/96boards/nitrogen/doc/index.rst
index 952f112..8934474 100644
--- a/boards/96boards/nitrogen/doc/index.rst
+++ b/boards/96boards/nitrogen/doc/index.rst
@@ -311,7 +311,7 @@
    :goals: debug
 
 .. _pyOCD:
-    https://github.com/mbedmicro/pyOCD
+    https://github.com/pyocd/pyOCD
 
 .. _CMSIS DAP:
     https://developer.mbed.org/handbook/CMSIS-DAP
@@ -323,7 +323,7 @@
     http://wiki.seeed.cc/BLE_Nitrogen/
 
 .. _pyOCD issue 259:
-    https://github.com/mbedmicro/pyOCD/issues/259
+    https://github.com/pyocd/pyOCD/issues/259
 
 .. _96Boards IE Specification:
     https://linaro.co/ie-specification
diff --git a/doc/develop/debug/index.rst b/doc/develop/debug/index.rst
index a7afdab..7a74eda 100644
--- a/doc/develop/debug/index.rst
+++ b/doc/develop/debug/index.rst
@@ -363,4 +363,4 @@
 
 .. _Eclipse IDE for C/C++ Developers: https://www.eclipse.org/downloads/packages/eclipse-ide-cc-developers/oxygen2
 .. _GNU MCU Eclipse plug-ins: https://gnu-mcu-eclipse.github.io/plugins/install/
-.. _pyOCD v0.11.0: https://github.com/mbedmicro/pyOCD/releases/tag/v0.11.0
+.. _pyOCD v0.11.0: https://github.com/pyocd/pyOCD/releases/tag/v0.11.0