[CI] Fix full pipeline not being triggered when only the xrd ssi submodule changes
Description
This MR updates the changes list to ensure a change in only the xrootd-ssi-protobuf-interface submodule still correctly triggers the full pipeline.
Checklist
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Documentation reflects the changes made. -
Merge Request title is clear, concise, and suitable as a changelog entry. See our contributing docs
References
Closes #1291 (closed)