README.md: update references to firmware-tools

The repository has moved from flash-tools to firmware-tools so update
the README.md accordingly.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>

README.md

@@ -9,15 +9,15 @@ be able to use it:
 
 ```
 sudo apt install git-lfs  # on Debian...
-git clone https://gitlab.collabora.com/chromium/flash-tools.git
-cd flash-tools
+git clone https://gitlab.collabora.com/chromium/firmware-tools.git
+cd firmware-tools
 git lfs fetch
 git lfs checkout
 ```
 
 # Flashing
 
-The [`servoflash.py`](https://gitlab.collabora.com/chromium/flash-tools/-/blob/master/servoflash.py) tool can be used to flash firmware images onto Chromebook
+The [`servoflash.py`](https://gitlab.collabora.com/chromium/firmware-tools/-/blob/master/servoflash.py) tool can be used to flash firmware images onto Chromebook
 devices using a Servo interface.  It uses a specific `flashrom` binary with its
 library dependencies copied from the Chromium OS SDK.  They can be found in the
 local `bin` and `lib` directories in this repository.
@@ -60,7 +60,7 @@ easier, this repository contains a Docker container and some helper scripts to
 build firmware images for some known device types.
 
 The
-[`cros-build/bootstrap.sh`](https://gitlab.collabora.com/chromium/flash-tools/-/blob/master/cros-build/bootstrap.sh)
+[`cros-build/bootstrap.sh`](https://gitlab.collabora.com/chromium/firmware-tools/-/blob/master/cros-build/bootstrap.sh)
 script can be used to create local directories, then build the Docker container
 which will be using them and start it.  It takes only one argument which is the
 device type.  For example: