Ruby version update for jekyll image

src/jekyll/.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-ARG VARIANT=3.3-bookworm
+ARG VARIANT=3.4-bookworm
 FROM mcr.microsoft.com/devcontainers/ruby:${VARIANT}
 
 USER root

src/jekyll/README.md

@@ -35,10 +35,10 @@ You can directly reference pre-built versions of `Dockerfile` by using the `imag
 - `mcr.microsoft.com/devcontainers/jekyll:buster`
 
 You can decide how often you want updates by referencing a [semantic version](https://semver.org/) of each image. For example:
+- `mcr.microsoft.com/devcontainers/jekyll:3` (or `3-bookworm`, `3-bullseye` to pin to an OS version)
+- `mcr.microsoft.com/devcontainers/jekyll:3.0` (or `3.0-bookworm`, `3.0-bullseye`  to pin to an OS version)
+- `mcr.microsoft.com/devcontainers/jekyll:3.0.0` (or `3.0.0-bookworm`, `3.0.0-bullseye` to pin to an OS version)
 
-- `mcr.microsoft.com/devcontainers/jekyll:2` (or `2-bookworm`, `2-bullseye` to pin to an OS version)
-- `mcr.microsoft.com/devcontainers/jekyll:2.1` (or `2.1-bookworm`, `2.1-bullseye` to pin to an OS version)
-- `mcr.microsoft.com/devcontainers/jekyll:2.1.20` (or `2.1.20-bookworm`, `2.1.20-bullseye` to pin to an OS version)
 
 However, we only do security patching on the latest [non-breaking, in support](https://github.com/devcontainers/images/issues/90) versions of images (e.g. `2-bullseye`). You may want to run `apt-get update && apt-get upgrade` in your Dockerfile if you lock to a more specific version to at least pick up OS security updates.
 

src/jekyll/manifest.json

@@ -1,14 +1,19 @@
 {
-	"version": "2.1.21",
+	"version": "2.2.0",
 	"variants": [
+		"3.4-bookworm",
 		"3.3-bookworm",
 		"3.3-bullseye"
 	],
 	"build": {
-		"latest": "3.3-bookworm",
+		"latest": "3.4-bookworm",
 		"parent": "ruby",
 		"rootDistro": "debian",
 		"architectures": {
+			"3.4-bookworm": [
+				"linux/amd64",
+				"linux/arm64"
+			],
 			"3.3-bookworm": [
 				"linux/amd64",
 				"linux/arm64"
@@ -22,6 +27,10 @@
 			"jekyll:${VERSION}-${VARIANT}"
 		],
 		"variantTags": {
+			"3.4-bookworm": [
+				"jekyll:${VERSION}",
+				"jekyll:${VERSION}-bookworm"
+			],
 			"3.3-bookworm": [
 				"jekyll:${VERSION}",
 				"jekyll:${VERSION}-bookworm"