Fix version Regex in Binary install script

Previous regex was including the "v" in the query, causing the release links to 404, since the filenames in the releases do not contain the "v".

install.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-VERSION=$(curl --silent "https://api.github.com/repos/miguelmota/cointop/releases/latest" | grep -Po --color=never '"tag_name": "\K.*?(?=")')
+VERSION=$(curl --silent "https://api.github.com/repos/miguelmota/cointop/releases/latest" | grep -Po --color=never '"tag_name": ".\K.*?(?=")')
 
 OSNAME="linux"
 if [[ $(uname) == 'Darwin' ]]; then
@@ -9,7 +9,7 @@ fi
 
 (
   cd /tmp
-  wget https://github.com/miguelmota/cointop/releases/download/${VERSION}/cointop_${VERSION}_${OSNAME}_amd64.tar.gz
+  wget https://github.com/miguelmota/cointop/releases/download/v${VERSION}/cointop_${VERSION}_${OSNAME}_amd64.tar.gz
   tar -xvzf cointop_${VERSION}_${OSNAME}_amd64.tar.gz cointop
 
   sudo mv cointop /usr/local/bin/cointop