Upgrade: [dependabot] - Update devcontainer image version to v1.2.0 (#116)

This PR updates the devcontainer image version to v1.2.0.

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Co-authored-by: eps-create-pull-request[bot] <270920461+eps-create-pull-request[bot]@users.noreply.github.com>
Co-authored-by: Anthony Brown <anthony.brown8@nhs.net>

Author: eps-create-pull-request[bot]

.devcontainer/devcontainer.json

@@ -6,7 +6,7 @@
     "args": {
       "DOCKER_GID": "${env:DOCKER_GID:}",
       "IMAGE_NAME": "node_24_python_3_14",
-      "IMAGE_VERSION": "v1.0.6",
+      "IMAGE_VERSION": "v1.2.0",
       "USER_UID": "${localEnv:USER_ID:}",
       "USER_GID": "${localEnv:GROUP_ID:}"
     },