Use submodule path for upload-bom.sh instead of raw URL

PCB projects already check out kicad-ci as a .gitlab submodule
(GIT_SUBMODULE_STRATEGY: recursive). Using the local path keeps
the script version pinned to the submodule pointer + removes the
need for the kicad9 ref hardcoded in the curl URL.

kibot-ci.yml

@@ -343,14 +343,12 @@ generate_panel:
   image: curlimages/curl:8.10.1
   before_script:
     - apk add --no-cache bash jq
-    # Fetch the upload script from the kicad-ci repo so the yml stays
-    # self-contained (GitLab's `include: project:` only ships the yml
-    # itself, not sibling files in the repo). The ref pins to kicad9
-    # — bump if you move the script.
-    - |
-      curl -fsSL -o /usr/local/bin/upload-bom.sh \
-        "https://gitlab.com/Micromelon/education/hardware/kicad-ci/-/raw/kicad9/scripts/upload-bom.sh"
-      chmod +x /usr/local/bin/upload-bom.sh
+    # Each PCB project checks out kicad-ci as a submodule under
+    # .gitlab/ (with GIT_SUBMODULE_STRATEGY: recursive at the top of
+    # this file), so scripts/upload-bom.sh is available locally —
+    # no raw-URL fetch needed, and the script's version stays in
+    # lockstep with the submodule pointer the project pins to.
+    - install -m 0755 "$CI_PROJECT_DIR/.gitlab/scripts/upload-bom.sh" /usr/local/bin/upload-bom.sh
 
 astable_dev:
   extends: .astable_base