Revert changes to install doc

Continue to point to old installer file

docs/linux_install.md

@@ -5,7 +5,7 @@ Generic Linux devices are supported via SPIDEV, MRAA, RPi native via BCM2835, or
 
 @note The SPIDEV option should work with most Linux systems supporting spi userspace device.
 
-@warning The manual install instructions are beginning to age because they were designed with the assumption that
+@warning These install instructions are beginning to age because they were designed with the assumption that
 the arm-linux-gnueabihf-g\*\* compilers were available and default for the system. If you have problems
 using the manual install instructions (especially on a 64-bit OS), please try the
 [instructions using CMake](md_docs_using_cmake.html).
@@ -18,9 +18,9 @@ pigpio is now required for using the radio's IRQ pin. This applies to RPi, SPIDE
 **Designed & Tested on RPi** - Defaults to SPIDEV on devices supporting it
 
 1. Install prerequisites if there are any (pigpio, MRAA, LittleWire libraries, setup SPI device etc)
-2. Download the install.sh file from [https://github.com/nRF24/.github/blob/main/installer/install.sh](https://raw.githubusercontent.com/nRF24/.github/main/installer/install.sh)
+2. Download the install.sh file from [http://tmrh20.github.io/RF24Installer/RPi/install.sh](wget http://tmrh20.github.io/RF24Installer/RPi/install.sh)
    ```shell
-   wget https://raw.githubusercontent.com/nRF24/.github/main/installer/install.sh
+   wget http://tmrh20.github.io/RF24Installer/RPi/install.sh
    ```
 3. Make it executable
    ```shell