readme: fix broken link to installation instructions (#26497)

update link to the installation instructions

README.md

@@ -14,7 +14,7 @@ archives are published at https://geth.ethereum.org/downloads/.
 
 ## Building the source
 
-For prerequisites and detailed build instructions please read the [Installation Instructions](https://geth.ethereum.org/docs/install-and-build/installing-geth).
+For prerequisites and detailed build instructions please read the [Installation Instructions](https://geth.ethereum.org/docs/getting-started/installing-geth).
 
 Building `geth` requires both a Go (version 1.18 or later) and a C compiler. You can install
 them using your favourite package manager. Once the dependencies are installed, run