build: update level_zero revision to v1.20.6

Signed-off-by: ocldev <[email protected]>

Author: Compute-Runtime-Automation

manifests/manifest.yml

@@ -52,7 +52,7 @@ components:
     dest_dir: level_zero
     type: git
     branch: master
-    revision: v1.20.4
+    revision: v1.20.6
     repository: https://github.com/oneapi-src/level-zero
   libva:
     asset_name: libva