meson: nlohmann-json: update to 3.11.3

Update the version reference in meson.build to match
the subproject wrap file: 3.11.3.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I15f0d697eaae8cfd48c638909dbb35b129bce910
diff --git a/meson.build b/meson.build
index 479900c..fe6f113 100644
--- a/meson.build
+++ b/meson.build
@@ -267,7 +267,7 @@
 
 nlohmann_json_dep = dependency(
     'nlohmann_json',
-    version: '>=3.11.2',
+    version: '>=3.11.3',
     include_type: 'system',
 )
 bmcweb_dependencies += nlohmann_json_dep