doc: fix github urls to use the new org

Signed-off-by: Fabio Utzig <fabio.utzig@nordicsemi.no>
diff --git a/docs/index.md b/docs/index.md
index 90427f7..299916b 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -41,7 +41,7 @@
 The issues being planned and worked on are tracked using GitHub issues. To participate
 please visit:
 
-[MCUboot Issues](https://github.com/JuulLabs-OSS/mcuboot/issues)
+[MCUboot Issues](https://github.com/mcu-tools/mcuboot/issues)
 
 ~~Issues were previously tracked on [MCUboot JIRA](https://runtimeco.atlassian.net/projects/MCUB/summary)
 , but it is now deprecated.~~
@@ -55,13 +55,13 @@
 
 For more information in the source, here are some pointers:
 
-- [boot/bootutil](https://github.com/JuulLabs-OSS/mcuboot/tree/master/boot/bootutil): The core of the bootloader itself.
-- [boot/boot\_serial](https://github.com/JuulLabs-OSS/mcuboot/tree/master/boot/boot_serial): Support for serial upgrade within the bootloader itself.
-- [boot/zephyr](https://github.com/JuulLabs-OSS/mcuboot/tree/master/boot/zephyr): Port of the bootloader to Zephyr
-- [boot/mynewt](https://github.com/JuulLabs-OSS/mcuboot/tree/master/boot/mynewt): Mynewt bootloader app
-- [boot/mbed](https://github.com/JuulLabs-OSS/mcuboot/tree/master/boot/mbed): Port of the bootloader to Mbed-OS
-- [imgtool](https://github.com/JuulLabs-OSS/mcuboot/tree/master/scripts/imgtool.py): A tool to securely sign firmware images for booting by MCUboot.
-- [sim](https://github.com/JuulLabs-OSS/mcuboot/tree/master/sim): A bootloader simulator for testing and regression
+- [boot/bootutil](https://github.com/mcu-tools/mcuboot/tree/master/boot/bootutil): The core of the bootloader itself.
+- [boot/boot\_serial](https://github.com/mcu-tools/mcuboot/tree/master/boot/boot_serial): Support for serial upgrade within the bootloader itself.
+- [boot/zephyr](https://github.com/mcu-tools/mcuboot/tree/master/boot/zephyr): Port of the bootloader to Zephyr
+- [boot/mynewt](https://github.com/mcu-tools/mcuboot/tree/master/boot/mynewt): Mynewt bootloader app
+- [boot/mbed](https://github.com/mcu-tools/mcuboot/tree/master/boot/mbed): Port of the bootloader to Mbed-OS
+- [imgtool](https://github.com/mcu-tools/mcuboot/tree/master/scripts/imgtool.py): A tool to securely sign firmware images for booting by MCUboot.
+- [sim](https://github.com/mcu-tools/mcuboot/tree/master/sim): A bootloader simulator for testing and regression
 
 ## Joining