update windows installer

add info on Visual C++ redistributable and changed name of installer

Author: karl

cava_win/postsetupinfo.txt

@@ -1 +1,5 @@
-config file for cava is created in "%USERPROFILE%\.config\cava" upon first launch
+config file for cava is created in "%USERPROFILE%\.config\cava" upon first launch
+
+you need to install Visual C++ redistributable if you do not already have it:
+
+https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist

cava_win/setup.iss

@@ -27,7 +27,7 @@ DisableProgramGroupPage=yes
 LicenseFile=..\LICENSE
 ; Remove the following line to run in administrative install mode (install for all users).
 PrivilegesRequired=lowest
-OutputBaseFilename=cava_win
+OutputBaseFilename=cava_win_x64_install
 SolidCompression=yes
 WizardStyle=modern
 InfoAfterFile=postsetupinfo.txt