manuals: replace "rootfs" by "root filesystem"

Almost everyone understands "rootfs", but "root filesystem"
is real English.

(From yocto-docs rev: 3d610f15e5b6be3435e9e81e4498a676671e5b39)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/migration-guides/migration-2.2.rst b/documentation/migration-guides/migration-2.2.rst
index c063deb44b..a6c1a4aa48 100644
--- a/documentation/migration-guides/migration-2.2.rst
+++ b/documentation/migration-guides/migration-2.2.rst
@@ -154,7 +154,7 @@ enables fine-grained tuning of options passed to QEMU without the
 Using a configuration file is particularly convenient when trying to use
 QEMU with machines other than the ``qemu*`` machines in
 :term:`OpenEmbedded-Core (OE-Core)`. The ``qemuboot.conf`` file is generated by the
-``qemuboot`` class when the root filesystem is being build (i.e. build
+``qemuboot`` class when the root filesystem is being built (i.e. build
 rootfs). QEMU boot arguments can be set in BSP's configuration file and
 the ``qemuboot`` class will save them to ``qemuboot.conf``.