Update installation.md

The command for command prompt was wrong

content/lua.scripts.manual/installation.md

@@ -60,9 +60,13 @@ The recommended way to enable and disable specific scripts is using the script m
 
     echo 'require "tools/script_manager"' > ~/.config/darktable/luarc
 
-### Windows ( via command prompt )
+### Windows
+inside command prompt:
 
     echo require 'tools/script_manager' > %LOCALAPPDATA%\darktable\luarc
+inside PowerShell:
+    
+    echo "require 'tools/script_manager'" > $env:LOCALAPPDATA\darktable\luarc
 
 ### Snap
 

content/lua.scripts.manual/troubleshooting.md

@@ -22,4 +22,4 @@ Open a terminal and start darktable with the command `/Applications/darktable.ap
 
 ### Windows
 
-Open a command prompt. Start darktable with the command `"C:\Program Files\darktable\bin\darktable" -d lua > log.txt 2>&1`. This provides debugging information to give you insight into what is happening.
+Open a command prompt. Start darktable with the command "C:\Program Files\darktable\bin\darktable" -d lua > log.txt. This provides debugging information to give you insight into what is happening.