build-appliance-image: Update to dunfell head revision

(From OE-Core rev: 3f40d5f095ceb099b604750db96058df00fcd49e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/images/build-appliance-image_15.0.0.bb

@@ -24,7 +24,7 @@ IMAGE_FSTYPES = "wic.vmdk"
 
 inherit core-image setuptools3
 
-SRCREV ?= "8a7fd5f633a2b72185501d4c4a8a51ed1fc7cea1"
+SRCREV ?= "08bd8cc1148b7b8b353ba5002560b0c2b3973a71"
 SRC_URI = "git://git.yoctoproject.org/poky;branch=dunfell \
            file://Yocto_Build_Appliance.vmx \
            file://Yocto_Build_Appliance.vmxf \