workspace: update linux-firmware to 20231211

Change-Id: I14aaa08103bfecad8f0485f7fa1bc27117e1cbae
Reviewed-on: https://review.monogon.dev/c/monogon/+/2594
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/WORKSPACE b/WORKSPACE
index be413fc..dfc75fd 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -201,7 +201,7 @@
 
 linux_firmware_external(
     name = "linux-firmware",
-    version = "20230919",
+    version = "20231211",
 )
 
 load("//third_party/intel_ucode:external.bzl", "intel_ucode_external")