release-notes: Add release notes for 0.14.0-rc1

This commit adds the release notes for the Zephyr SDK 0.14.0-rc1
release.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

release-notes.md

@@ -1,5 +1,17 @@
 # Notes / Changes in various releases
 
+## Zephyr SDK 0.14.0-rc1
+
+- general:
+  * Fixed host tools setup failure when running `setup.sh` on AArch64 Linux.
+
+- gdb:
+  * Removed GCC dynamic library dependencies for improved cross-distro
+    compatibility.
+  * Fixed missing Python scripting functionality for `linux-aarch64`,
+    `macos-aarch64`, and `windows-x86_64` builds.
+  * Fixed broken command line key inputs on Windows.
+
 ## Zephyr SDK 0.14.0-beta1
 
 - general: