Update install.ps1

windows/install.ps1

@@ -244,10 +244,10 @@ Function Install-PostgreSQL() {
 }
 Function Install-Git(){
     if ($env:PROCESSOR_ARCHITECTURE -eq "x86") {
-        $url = "https://github.com/git-for-windows/git/releases/download/v2.6.4.windows.1/Git-2.6.4-32-bit.exe"
+Ω        $url = "https://github.com/git-for-windows/git/releases/download/v2.15.1.windows.2/Git-2.15.1.2-32-bit.exe"
     }
     else {
-        $url = "https://github.com/git-for-windows/git/releases/download/v2.6.4.windows.1/Git-2.6.4-64-bit.exe"
+        $url = "https://github.com/git-for-windows/git/releases/download/v2.15.1.windows.2/Git-2.15.1.2-64-bit.exe"
     }
 
     Write-Host Download Git from $url -ForegroundColor Cyan