docs: Update URLs

[gibson042]

https://hub.cosmos.network/main/hub-tutorials/live-upgrade-tutorial.html in particular is now a 404

[turadg]

👍

[gibson042]

@turadg Any idea why CI test-proposals is failing?

https://github.com/Agoric/agoric-3-proposals/actions/runs/8285453834/job/22673248172?pr=127#step:10:3304
#333 40.31 6:02PM ERR UPGRADE "agoric-upgrade-8" NEEDED at height: 36: {}
#333 40.31 6:02PM ERR CONSENSUS FAILURE!!! err="UPGRADE "agoric-upgrade-8" NEEDED at height: 36: {}" module=consensus stack="goroutine 131 [running]:\nruntime/debug.Stack()\n…"
#333 40.77 Upgrade height for agoric-upgrade-8 reached. Killing agd
#333 40.77 (CONSENSUS FAILURE above for height 36 is expected)
#333 40.77 killAgd()
#333 40.77 state directory /root/.agoric ready for upgrade to agoric-upgrade-8
#333 DONE 40.8s
…
#557 [use-upgrade-13 linux/amd64 eval-statom-vaults 6/6] RUN ./run_eval.sh 55:statom-vaults
…
#0 1.606 waiting for bootstrap...
#0 3.284 Error: failed to listen on 0.0.0.0:26657: listen tcp 0.0.0.0:26657: bind: address already in use
#0 3.284 Usage:
#0 3.284 ag-chain-cosmos start [flags]
…
#0 41.43 3 tests passed
#0 41.43 5 tests remained pending after a timeout
#557 ERROR: process "/bin/bash -c ./run_eval.sh 55:statom-vaults" did not complete successfully: exit code: 1

#558 [use-upgrade-9 linux/amd64 execute-upgrade-8 5/7] RUN --mount=type=cache,target=/root/.yarn ./install_deps.sh 16:upgrade-8
#558 CANCELED

#559 [use-lo-bundle-cost linux/amd64 use-upgrade-8 3/3] RUN ./run_use.sh 16:upgrade-8
#559 Deduplicating step ID [linux/amd64 use-upgrade-8 3/3] RUN ./run_use.sh 16:upgrade-8, another build is calculating it done
#559 ...

#560 [use-upgrade-13 linux/arm64 prepare-upgrade-10 4/4] RUN ./run_prepare.sh 34:upgrade-1

I'm thinking that killAgd doesn't correctly handle situations where agd terminates itself for upgrade, but it's difficult to know for sure because the agd start command that fails with "failed to listen on 0.0.0.0:26657" in startAgd is preceded by a call to netstat without the --listening option that is necessary to show listening sockets. Assuming the purpose of that netstat is diagnosing this kind of issue, have we considered netstat -plnA inet (or netstat -nap if we actually care about active connections) and possibly also ps or pgrep?

[turadg]

Any idea why CI test-proposals is failing?

#93

For now the workaround is to rebuild repeatedly. Each time advances the cache. #126 might fix #93 but I had to move on to other work