CHANGELOG.md: mention new Docker images and docker-compose example

While the update is an internal change, it does affect the MSRV, so it
should be mentioned in the changelog.

.github/workflows/MinedMap.yml

@@ -131,6 +131,8 @@ jobs:
           targets: '${{ matrix.target }}'
 
       - uses: swatinem/rust-cache@v2
+        with:
+          key: '${{ matrix.target }}'
 
       - name: 'Build'
         shell: 'bash'

CHANGELOG.md

@@ -39,6 +39,11 @@
   Note that some platforms like `msvc` are unsupported by jemalloc, and trying
   to enable the `jemalloc` feature on these platforms may break the MinedMap
   build or cause issues at runtime.
+- Docker images can be downloaded from the GitHub Container registry
+
+  Two images are provided, one for the tile renderer and one with the viewer
+  and a web server. A `docker-compose.yml` example can be found in the
+  repository as a starting point.
 
 ### Changed
 
@@ -56,6 +61,11 @@
   "waterlogged" block status. As 1-block seagrass is relatively big compared to
   other "small" plants, just considering it opaque seems like a good enough
   solution that avoids having to implement advanced block status flags.
+- Use Bincode 2 for storage of intermediate data
+
+  The update from Bincode 1 to 2 slightly reduces the size of the `processed`
+  directory used for intermediate data. At least Rust 1.85 is now required to
+  build MinedMap.
 
 ## [2.4.0] - 2025-01-11