Update index.mdx

Add new file type support

Author: warnessa

src/content/docs/cloudflare-one/policies/gateway/http-policies/index.mdx

@@ -543,12 +543,14 @@ Gateway supports the following file types for use with the _Download File Types_
 
 <Details header="Executable">
 
+- Apple Software Package (`.pkg`)
 - Dynamic-link library (DLL) file (`.dll`)
 - Executable and Linkable Format (ELF) file (`.elf`)
 - Java archive (JAR) package (`.jar`)
 - Java class file (`.class`)
 - Mach object (Mach-O) file (`.macho`)
 - Microsoft Windows installer (`.msi`)
+- Microsoft Software Installer (`.msix`, `.appx`)
 - Microsoft Windows executable (`.exe`)
 
 </Details>
@@ -571,6 +573,12 @@ Gateway supports the following file types for use with the _Download File Types_
 
 </Details>
 
+<Details header="System">
+
+- Apple Disk Image (`.dmg`)
+
+</Details>
+
 <Details header="Unscannable">
 
 <Render file="gateway/policies/unscannable-files" product="cloudflare-one" />