Update IPFS Kubo to 0.26.0

[Jorropo]

cc @cypt4 @bbondy @autonome

Signed Binaries: https://dist.ipfs.tech/kubo/v0.26.0/
Release Notes: https://github.com/ipfs/kubo/blob/master/docs/changelogs/v0.26.md (ipfs/kubo#10259)

Important feature

Commands ipfs key sign and ipfs key verify

This allows the Kubo node to sign arbitrary bytes to prove ownership of a PeerID or an IPNS Name. To avoid signature reuse, the signed payload is always prefixed with libp2p-key signed message:.

These commands are also both available through the RPC client and implemented in client/rpc.

For more information see ipfs/kubo#10230.

This is required for #14774

[hacdias]

@Jorropo can you bump this issue to Kubo 0.26.0? I don't think we need to open a new one since this hasn't been done yet.