meson: fix trivial s/dir/dri/ typo

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6354>
diff --git a/meson.build b/meson.build
index 2478753..88dcc81 100644
--- a/meson.build
+++ b/meson.build
@@ -1650,7 +1650,7 @@
   osmesa_bits = get_option('osmesa-bits')
   if osmesa_bits != '8'
     if with_dri or with_glx != 'disabled'
-      error('OSMesa bits must be 8 if building glx or dir based drivers')
+      error('OSMesa bits must be 8 if building glx or dri based drivers')
     endif
     osmesa_lib_name = osmesa_lib_name + osmesa_bits
     pre_args += [