docs: fix Meson options filename in code organization guide

The code organization document points contributors to
`pldm/meson_options.txt` when adding a new Meson option for
OEM code.

This repository uses `pldm/meson.options`, and the old file
name does not exist in the current tree.

Update the documentation to reference the correct file so
contributors are not directed to a non-existent path.

Change-Id: I03b4fccfefe81da4611264ee727ef0ef514357cc
Signed-off-by: Meghana Vangapandu <meghanav@ami.com>

docs/code_organisation.md

diff --git a/docs/code_organisation.md b/docs/code_organisation.md
index 9921c1d..0fbb20f 100644
--- a/docs/code_organisation.md
+++ b/docs/code_organisation.md
@@ -40,9 +40,8 @@
 placed under the folder oem/<oem_name>/libpldmresponder. They must be adhering
 to the rules mentioned under the libpldmresponder section above.
 
-Once the above is done a meson option has to be created in
-`pldm/meson_options.txt` with its mapped compiler flag to enable conditional
-compilation.
+Once the above is done a meson option has to be created in `pldm/meson.options`
+with its mapped compiler flag to enable conditional compilation.
 
 For consistency would recommend using "oem-<oem_name>".