This proposal shall authorize the runtime upgrade to Spiritnet v1.7.5. Most notably, it upgrades to Polkadot v0.9.29 which re--enables batching over unsigned calls and deprecates the `state-cache` CLI parameter for node operators. More information can be found in [the release notes](https://github.com/KILTprotocol/kilt-node/releases/tag/1.7.5)

Currently, only `Batch(DidCall1, DidCall2, DidCall3)` works but not `DidCall(Batch(call1, call2, call3)`.

Here's the result of sr-tool:

```
Summary generated with srtool v0.9.23 using the docker image paritytech/srtool:1.64.0:
== Compressed
 Version          : kilt-spiritnet-10750
 Metadata         : V14
 Size             : 884.90 KB (906137 bytes)
 Compression      : 81.14%
 setCode          : 0x1c9d79a1e45dcf223ddb6cd19a6a4cdae3c7718fb1d1f43c74be6469bc4e768f
 authorizeUpgrade : 0x1f0f1a3a3f63d2d19c37d19ce11f04d78b9f062b7e44362642a27892ce21e82e
 IPFS             : QmPonU7Bvi3TZeZNcSH3AUGmP7wND1QVCMRYecEMKrpBNo
 BLAKE2_256       : 0x8f49932abaa0d1e45f1093a8461d550c263b674668d65b1768fa215e60576e6b
 Wasm             : runtimes/spiritnet/target/srtool/release/wbuild/spiritnet-runtime/spiritnet_runtime.compact.compressed.wasm
```

1. There is a proposal to upgrade something called Spiritnet to version 1.7.5.
2. The upgrade includes some changes to make things work better.
3. One of the changes is to upgrade to something called Polkadot version 0.9.29.
4. The upgrade also fixes a problem where one thing works but another thing doesn't.
5. There is more information about the upgrade in a link to the release notes.

#25 Spiritnet v1.7.5 (Butchering Batcher)