update doc

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

sycl/doc/developer/DockerBKMs.md

@@ -50,11 +50,15 @@ The following containers are publicly available for DPC++ compiler development:
    development kits for NVidia/AMD from the `ubuntu2204_build` container.
 - `ghcr.io/intel/llvm/ubuntu2404_intel_drivers`: contains everything from the
    Ubuntu 24.04 base container + pre-installed Intel drivers.
-   The image comes in two flavors/tags:
+   The image comes in three flavors/tags:
+   * `latest`: Intel drivers are downloaded from release/tag and saved in
+    dependencies.json. The drivers are tested/validated everytime we upgrade
+    the driver.
    * `devigc`: Intel Graphics Compiler driver from github actions artifacts,
    other drivers are downloaded from release/tag and saved in dependencies.json.
    * `unstable`: Intel drivers are downloaded from release/latest.
-   The drivers are installed as it is, not tested or validated.
+   The drivers are installed as it is, not tested or validated, except for
+   `latest`.
 - `ghcr.io/intel/llvm/ubuntu2204_build`: has development kits installed for
    NVidia/AMD and can be used for building DPC++ compiler from source with all
    backends enabled or for end-to-end testing with HIP/CUDA on machines with