feat(install-go): Add var to control Go version

And Update Go version to 1.21.8

install-go.sh

@@ -2,15 +2,18 @@
 
 echo "Welcome to the Go installer script"
 
+# Control variables
+GO_LANG_VERSION=1.21.8
+
 ##############
 # Install Go #
 ##############
-echo "[INFO] Installing Go"
+echo "[INFO] Installing Go $GO_LANG_VERSION"
 echo "[INFO] Downloading the package from source"
-# Install Go 1.21.6
-wget -nc https://dl.google.com/go/go1.21.6.linux-amd64.tar.gz
+# Install Go
+wget -nc https://dl.google.com/go/go$GO_LANG_VERSION.linux-amd64.tar.gz
 echo "[INFO] Extracting and installing package contents"
-sudo tar -C /usr/local -zxf go1.21.6.linux-amd64.tar.gz
+sudo tar -C /usr/local -zxf go$GO_LANG_VERSION.linux-amd64.tar.gz
 echo "[INFO] Updating envitonment vars"
 mkdir -p ~/go/{bin,pkg,src}
 echo 'export GOPATH=$HOME/go' >> ~/.bashrc