Fix flash-layout.md link

31de159f moved flash-layout.md to architecture/

Change-Id: I023e0a8c061b5efa74a7c850a6249627f03bf536
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/meson_options.txt b/meson_options.txt
index 0043434..d37e681 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,5 +1,5 @@
 # Supported BMC layout types. Reference:
-# https://github.com/openbmc/docs/blob/master/code-update/flash-layout.md#supported-filesystem-choices
+# https://github.com/openbmc/docs/blob/master/architecture/code-update/flash-layout.md#supported-filesystem-choices
 # - static: NOR flash configured with fixed-sized MTD partitions.
 # - ubi: NOR flash device configured with UBI volumes.
 # - mmc: eMMC flash device configured with ext4 filesystems.