Fix some broken links

[daniel-farina]

I still need to fix the following broken links:

On source page path = /networks/join-testnet:
-> linking to ../osmosis-core/osmosisd.md (resolved as: /osmosis-core/osmosisd.md)

• On source page path = /osmosis-core:
  -> linking to /osmosis-core/guides/structure/transaction

• On source page path = /osmosis-core/modules/spec-gamm:
  -> linking to ./client/docs/create-lbp-pool.md (resolved as: /osmosis-core/modules/client/docs/create-lbp-pool.md)
  -> linking to ./client/docs/create-pool.md (resolved as: /osmosis-core/modules/client/docs/create-pool.md)

• On source page path = /osmosis-core/modules/spec-superfluid:
  -> linking to 07_proposals.md (resolved as: /osmosis-core/modules/07_proposals.md)
  -> linking to 03_messages.md (resolved as: /osmosis-core/modules/03_messages.md)
  -> linking to 04_epoch.md (resolved as: /osmosis-core/modules/04_epoch.md)
  -> linking to 06_hooks.md (resolved as: /osmosis-core/modules/06_hooks.md)

• On source page path = /osmosis-core/osmosisd:
  -> linking to ../network/join-testnet (resolved as: /network/join-testnet)
  -> linking to ../network/join-mainnet (resolved as: /network/join-mainnet)

• On source page path = /osmosis-core/relaying/ibc-relayers-list:
  -> linking to discord.silknodes.io (resolved as: /osmosis-core/relaying/discord.silknodes.io)

• On source page path = /overview/getting-started:
  -> linking to ../wallets/keplr/README.md (resolved as: /wallets/keplr/README.md)
  -> linking to ../terminology.md (resolved as: /terminology.md)
  -> linking to ../terminology.md#slippage (resolved as: /terminology.md)
  -> linking to ../terminology.md#fees (resolved as: /terminology.md)

• On source page path = /overview/integrate/registration:
  -> linking to info.osmosis.zone (resolved as: /overview/integrate/info.osmosis.zone)
  -> linking to coingecko.com (resolved as: /overview/integrate/coingecko.com)

• On source page path = /overview/osmo:
  -> linking to ../osmosis-core/modules/spec-superfluid.md (resolved as: /osmosis-core/modules/spec-superfluid.md)