fix: remaining broken links

lychee.toml

@@ -25,3 +25,11 @@ exclude_loopback = true
 
 # Exclude all mail addresses from checking.
 exclude_mail = true
+
+# Exclude RPC URLs from checking.
+exclude = [
+    'https://mainnet.optimism.io',
+    'https://mainnet-sequencer.optimism.io',
+    'https://sepolia.optimism.io',
+    'https://sepolia-sequencer.optimism.io',
+]

pages/builders/dapp-developers/bridging/standard-bridge.mdx

@@ -15,7 +15,7 @@ Transfers from OP Mainnet to Ethereum are completed in 7 days as a result of the
 
 The Standard Bridge is fully permissionless and supports standard ERC-20 tokens.
 Other bridging systems also exist that provide different features and security properties.
-You may wish to [explore some of these options](TODO) to find the bridge that works best for you and your application.
+You may wish to explore some of these options to find the bridge that works best for you and your application.
 
 <Callout type="error">
   The Standard Bridge **does not** support [**fee on transfer tokens**](https://github.com/d-xo/weird-erc20#fee-on-transfer) or [**rebasing tokens**](https://github.com/d-xo/weird-erc20#balance-modifications-outside-of-transfers-rebasingairdrops) because these types of tokens may cause bridge accounting errors.

pages/index.mdx

@@ -11,7 +11,7 @@ import { Cards, Card } from 'nextra/components'
 Welcome to the Optimism Docs, the unified home of the Optimism Collective's technical documentation.
 The Optimism Collective is a band of people, projects, and companies working together to build a better economy for everyone.
 
-Here you'll find everything you need to know about the Optimism tech stack, including [OP Mainnet](/chain/overview), the [OP Stack](/stack/overview), the [Optimism Superchain](/stack/explainer), and more.
+Here you'll find everything you need to know about the Optimism tech stack, including [OP Mainnet](/chain/getting-started), the [OP Stack](/stack/getting-started), the [Optimism Superchain](/stack/explainer), and more.
 Information about the Optimism Collective's governance, community, and mission can be found on the [Optimism Community Hub](https://community.optimism.io/docs/governance/).
 
 ## Guides for Builders

pages/stack/differences.mdx

@@ -77,7 +77,7 @@ You can use [the getter functions](https://docs.soliditylang.org/en/v0.8.12/cont
       [See here if you want additional details](https://ethereum.org/en/developers/tutorials/uniswap-v2-annotated-code/).
 
   2.  Helena Hacker provides Hackswap with liquidity that appears to allow for profitable arbitrage opportunities.
-      For example, she can make it so that you can spend 1 [DAI](https://www.coindesk.com/price/dai/)to buy 1.1 [USDT](https://www.coindesk.com/price/tether/).
+      For example, she can make it so that you can spend 1 [DAI](https://en.wikipedia.org/wiki/Dai_(cryptocurrency))to buy 1.1 [USDT](https://en.wikipedia.org/wiki/Tether_(cryptocurrency)).
       Both of those coins are supposed to be worth exactly $1.
 
   3.  Nimrod Naive knows that if something looks too good to be true it probably is.