Add release notes and blog entry for Camel 4.0.3

Author: gzurowski

content/blog/2023/11/RELEASE-4.0.3/camel-featured.jpg

@@ -0,0 +1,17 @@
+---
+title: "RELEASE 4.0.3"
+date: 2023-10-27
+draft: false
+authors: [gzurowski]
+categories: ["Releases"]
+preview: "The Camel community announces the immediate availability of a the new Camel 4.0.3 patch release"
+---
+
+The Camel community announces the immediate availability of the Camel 4.0.3 patch release with 23 improvements and fixes.
+
+The artifacts are published and ready for you to download from the Central Maven repository. For more details please take a look at the [release notes](/releases/release-4.0.3/).
+
+Many thanks to all who made this release possible.
+
+On behalf of the Camel PMC,  
+Gregor Zurowski