fix(base-images): build the node-less bun 1.4 image on Bun 1.4.4

The node-less Bun 1.4 deploy base image now builds on Bun 1.4.4.

Mono-RevId: f0c87354586fa6ef69cc42ac333c50b1224b1346

Author: ericallam

base-images/images.json

@@ -42,7 +42,7 @@
       "tag": "1.4-bookworm",
       "runtimeKind": "bun",
       "base": "debian:bookworm-slim@sha256:88200866dfff7ea7f5cbcb6ec7c8a701889efe6fe859fe64d6990e4b07ea4171",
-      "bunSource": "oven/bun:1.4.2-slim@sha256:cb3bbbb08e13a4a2ff400f24c7a2a1d5efa83f6ef8544d52d95a519631e2fc61"
+      "bunSource": "oven/bun:1.4.4-slim@sha256:1846adf22496bd711036aae8be147e57bdebbaea2e5264e3e0b5af1db187d9a4"
     }
   ]
 }