Refresh README.md (#10549)

- Update build badge to reflect the migration from CircleCI to GitHub Actions
- Remove issues badges for categories that are no longer in use
- Update docs links

README.md

@@ -11,7 +11,7 @@ and other packages. The source code for the Celo Blockchain which operates a nod
 
 <!-- row 1 - status -->
 
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+[![GitHub Actions](https://github.com/celo-org/celo-monorepo/actions/workflows/container-all-monorepo.yml/badge.svg)](https://github.com/celo-org/celo-monorepo/actions/workflows/container-all-monorepo.yml)
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@@ -36,8 +36,6 @@ and other packages. The source code for the Celo Blockchain which operates a nod
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 Contents:
 
@@ -96,7 +94,7 @@ The Celo stack is structured into the following logical layers:
 
 Follow the instructions in [SETUP.md](SETUP.md) to get a development environment set up.
 
-See [Developer's Guide](https://docs.celo.org/) for full details about the design of the Celo protocol and other information about running these projects.
+See [Developer's Guide](https://docs.celo.org/developer) for full details about the design of the Celo protocol and other information about running these projects.
 
 ## 🙋 <a id="issues"></a>Issues
 
@@ -111,9 +109,9 @@ The repository has the following packages (sub projects):
 - [dev-utils](packages/dev-utils) - a utils package for use as a dev dependency
 - [docs](packages/docs) - technical documentation for the Celo project ([live](https://docs.celo.org/))
 - [helm-charts](packages/helm-charts) - (DEPRECATED) templatized deployments of entire environments to Kubernetes clusters. Check [celo-org/charts](https://github.com/celo-org/charts) instead.
-- [protocol](packages/protocol) - identity, stability and other smart contracts for the Celo protocol ([docs](https://docs.celo.org/celo-codebase/protocol))
+- [protocol](packages/protocol) - identity, stability and other smart contracts for the Celo protocol ([docs](https://docs.celo.org/protocol))
 - [sdk](packages/sdk) - Typescript packages for interacting with Celo, including Contracts, Wallets, Crypto++
-- [contractkit](packages/sdk/contractkit) - library to help developers and validators interact with the protocol and its smart contracts ([docs](https://docs.celo.org/developer-guide/contractkit))
+- [contractkit](packages/sdk/contractkit) - library to help developers and validators interact with the protocol and its smart contracts ([docs](https://docs.celo.org/developer/contractkit))
 - [typescript](packages/typescript) - no README available (improve?)
 
 Code owners for each package can be found in [.github/CODEOWNERS](.github/CODEOWNERS).