v2.0: Update install docs to agave (backport of #2060) (#2061)

Update install docs to agave (#2060)

* s/SOLANA/AGAVE

* s/solana.com/anza.xyz

(cherry picked from commit b1bb9ff)

Co-authored-by: Tyera <tyera@anza.xyz>

docs/src/cli/install.md

@@ -19,26 +19,26 @@ on your preferred workflow:
 
 - Open your favorite Terminal application
 
-- Install the Solana release
-  [LATEST_SOLANA_RELEASE_VERSION](https://github.com/anza-xyz/agave/releases/tag/LATEST_SOLANA_RELEASE_VERSION)
+- Install the Agave release
+  [LATEST_AGAVE_RELEASE_VERSION](https://github.com/anza-xyz/agave/releases/tag/LATEST_AGAVE_RELEASE_VERSION)
   on your machine by running:
 
 ```bash
-sh -c "$(curl -sSfL https://release.solana.com/LATEST_SOLANA_RELEASE_VERSION/install)"
+sh -c "$(curl -sSfL https://release.anza.xyz/LATEST_AGAVE_RELEASE_VERSION/install)"
 ```
 
-- You can replace `LATEST_SOLANA_RELEASE_VERSION` with the release tag matching
+- You can replace `LATEST_AGAVE_RELEASE_VERSION` with the release tag matching
   the software version of your desired release, or use one of the three symbolic
   channel names: `stable`, `beta`, or `edge`.
 
 - The following output indicates a successful update:
 
 ```text
-downloading LATEST_SOLANA_RELEASE_VERSION installer
+downloading LATEST_AGAVE_RELEASE_VERSION installer
 Configuration: /home/solana/.config/solana/install/config.yml
 Active release directory: /home/solana/.local/share/solana/install/active_release
-* Release version: LATEST_SOLANA_RELEASE_VERSION
-* Release URL: https://github.com/anza-xyz/agave/releases/download/LATEST_SOLANA_RELEASE_VERSION/solana-release-x86_64-unknown-linux-gnu.tar.bz2
+* Release version: LATEST_AGAVE_RELEASE_VERSION
+* Release URL: https://github.com/anza-xyz/agave/releases/download/LATEST_AGAVE_RELEASE_VERSION/solana-release-x86_64-unknown-linux-gnu.tar.bz2
 Update successful
 ```
 
@@ -74,15 +74,15 @@ solana --version
   installer into a temporary directory:
 
 ```bash
-cmd /c "curl https://release.solana.com/LATEST_SOLANA_RELEASE_VERSION/agave-install-init-x86_64-pc-windows-msvc.exe --output C:\agave-install-tmp\agave-install-init.exe --create-dirs"
+cmd /c "curl https://release.anza.xyz/LATEST_AGAVE_RELEASE_VERSION/agave-install-init-x86_64-pc-windows-msvc.exe --output C:\agave-install-tmp\agave-install-init.exe --create-dirs"
 ```
 
 - Copy and paste the following command, then press Enter to install the latest
   version of Solana. If you see a security pop-up by your system, please select
   to allow the program to run.
 
 ```bash
-C:\agave-install-tmp\agave-install-init.exe LATEST_SOLANA_RELEASE_VERSION
+C:\agave-install-tmp\agave-install-init.exe LATEST_AGAVE_RELEASE_VERSION
 ```
 
 - When the installer is finished, press Enter.