[TEST] ci: Use sdk-build@main

Author: stephanosio

.github/workflows/ci.yml

@@ -269,7 +269,7 @@ jobs:
           MATRIX_HOSTS+='{
               "name": "linux-x86_64",
               "runner": "zephyr-runner-v2-linux-x64-4xlarge",
-              "container": "ghcr.io/zephyrproject-rtos/sdk-build:v1.4.2",
+              "container": "ghcr.io/zephyrproject-rtos/sdk-build:main@sha256:a6dcc71e9cf1efebb31794faf4dc1a87232942a470f6bae36c0507b5e21c80e7",
               "archive": "tar.xz"
             },'
         fi
@@ -278,7 +278,7 @@ jobs:
           MATRIX_HOSTS+='{
               "name": "linux-aarch64",
               "runner": "zephyr-runner-v2-linux-arm64-4xlarge",
-              "container": "ghcr.io/zephyrproject-rtos/sdk-build:v1.4.2",
+              "container": "ghcr.io/zephyrproject-rtos/sdk-build:main@sha256:a6dcc71e9cf1efebb31794faf4dc1a87232942a470f6bae36c0507b5e21c80e7",
               "archive": "tar.xz"
             },'
         fi
@@ -305,7 +305,7 @@ jobs:
           MATRIX_HOSTS+='{
               "name": "windows-x86_64",
               "runner": "zephyr-runner-v2-linux-x64-4xlarge",
-              "container": "ghcr.io/zephyrproject-rtos/sdk-build:v1.4.2",
+              "container": "ghcr.io/zephyrproject-rtos/sdk-build:main@sha256:a6dcc71e9cf1efebb31794faf4dc1a87232942a470f6bae36c0507b5e21c80e7",
               "archive": "7z"
             },'
         fi