Update outdated links in docs (#5380)

Co-authored-by: Arr00 <[email protected]>

docs/modules/ROOT/pages/access-control.adoc

@@ -24,7 +24,7 @@ WARNING: Removing the owner altogether will mean that administrative tasks that
 
 Ownable is a simple and effective way to implement access control, but you should be mindful of the dangers associated with transferring the ownership to an incorrect account that can't interact with this contract anymore. An alternative to this problem is using xref:api:access.adoc#Ownable2Step[`Ownable2Step`]; a variant of Ownable that requires the new owner to explicitly accept the ownership transfer by calling xref:api:access.adoc#Ownable2Step-acceptOwnership--[`acceptOwnership`].
 
-Note that *a contract can also be the owner of another one*! This opens the door to using, for example, a https://gnosis-safe.io[Gnosis Safe], an https://aragon.org[Aragon DAO], or a totally custom contract that _you_ create.
+Note that *a contract can also be the owner of another one*! This opens the door to using, for example, a https://safe.global[Gnosis Safe], an https://aragon.org[Aragon DAO], or a totally custom contract that _you_ create.
 
 In this way, you can use _composability_ to add additional layers of access control complexity to your contracts. Instead of having a single regular Ethereum account (Externally Owned Account, or EOA) as the owner, you could use a 2-of-3 multisig run by your project leads, for example. Prominent projects in the space, such as https://makerdao.com[MakerDAO], use systems similar to this one.
 

docs/modules/ROOT/pages/index.adoc

@@ -63,7 +63,7 @@ The guides in the sidebar will teach about different concepts, and how to use th
 
 The xref:api:token/ERC20.adoc[full API] is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts' development in the https://forum.openzeppelin.com[community forum].
 
-Finally, you may want to take a look at the https://blog.openzeppelin.com/guides/[guides on our blog], which cover several common use cases and good practices. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.
+The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.
 
 * https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05[The Hitchhiker’s Guide to Smart Contracts in Ethereum] will help you get an overview of the various tools available for smart contract development, and help you set up your environment.
 * https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094[A Gentle Introduction to Ethereum Programming, Part 1] provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.