fix: change Geth docs for Linux

src/pages/ValidatorOnboarding/ValidatorSetup/ValidatorInstalling/documentations.ts

@@ -43,7 +43,7 @@ export const DOCUMENTATIONS: Documentation = {
       [WINDOWS]:
         "### Windows\nThe easiest way to install Geth is to download a pre-compiled binary from the [downloads page](#). The page provides an installer as well as a zip file containing the Geth source code. The install wizard offers the user the option to install Geth, or Geth and the developer tools. The installer adds `geth` to the system's `PATH` automatically. The zip file contains the command `.exe` files that can be run from the command prompt. The full list of command line options can be viewed [here](#) or in the terminal by running `geth --help`.\n\nUpdating an existing Geth installation can be achieved by stopping the node, downloading and installing the latest version following the instructions above. When the node is started again, Geth will automatically use all the data from the previous version and sync the blocks that were missed while the node was offline. ",
       [LINUX]:
-        '### Arch Linux via pacman\nThe Geth package is available from the community repo. It can be installed by running:\n\n`pacman -S geth`\n\nThese commands install the core Geth software and the following developer tools: clef, devp2p, abigen, bootnode, evm, rlpdump and puppeth. The binaries for each of these tools are saved in `/usr/bin/`.\n\nThe full list of command line options can be viewed [here](#) or in the terminal by running `geth --help`.\n\nUpdating an existing Geth installation can be achieved by stopping the node and running the following command:\n\n`sudo pacman -Sy`\n\nWhen the node is started again, Geth will automatically use all the data from the previous version and sync the blocks that were missed while the node was offline.',
+        '### Ubuntu via PPAs \nThe easiest way to install Geth on Ubuntu-based distributions is with the built-in launchpad PPAs (Personal Package Archives). A single PPA repository is provided, containing stable and development releases for Ubuntu versions xenial, trusty, impish, focal, bionic. \n\nThe following command enables the launchpad repository:\n```\nsudo add-apt-repository -y ppa:ethereum/ethereum\n``` \n\nThen, to install the stable version of go-ethereum: \n```\nsudo apt-get update \nsudo apt-get install ethereum\n``` \n\nOr, alternatively the develop version: \n```\nsudo apt-get update \nsudo apt-get install ethereum-unstable\n``` \n\nThese commands install the core Geth software and the following developer tools: clef, devp2p, abigen, bootnode, evm and rlpdump. The binaries for each of these tools are saved in /usr/local/bin/. The full list of command line options can be viewed [here](#) or in the terminal by running \n```\ngeth --help\n``` \n\nUpdating an existing Geth installation to the latest version can be achieved by stopping the node and running the following commands: \n```\nsudo apt-get update \nsudo apt-get install ethereum \nsudo apt-get upgrade geth\n``` \n\nWhen the node is started again, Geth will automatically use all the data from the previous version and sync the blocks that were missed while the node was offline.',
     },
   },
   Erigon: {