If approved, this motion does spawn an external referendum that on approval does authorized the upgrade to zeitgeist-runtime v0.4.0 (spec_version 49)

https://github.com/zeitgeistpm/zeitgeist/releases/tag/v0.4.0

 Reject a proposed spend. The original deposit will be slashed.

 # <weight>
 - O(1).
 - Limited storage reads.
 - One DB clear.
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- **Problem Statement:** CouncilMotion proposes an external referendum for upgrading to zeitgeist-runtime v0.4.0 (spec_version 49).
- **Significance:** Enhancing the zeitgeist-runtime to v0.4.0 is crucial for improving the functionality and features of the system.
- **Proposed Solution:** Approval of the motion will authorize the upgrade to zeitgeist-runtime v0.4.0.
- **Expected Outcomes:** Improved system functionality and features post-upgrade.

#34 Propose upgrade to v0.4.0 (spec_version 49)