file_sys: Rename ContentRecordType::Patch to DeltaFragment

Avoids potential confusion, since patches and DeltaFragments are not the same thing. Actual full patches are listed under the Program type.

src/core/file_sys/nca_metadata.h

@@ -37,7 +37,7 @@ enum class ContentRecordType : u8 {
     Control = 3,
     Manual = 4,
     Legal = 5,
-    Patch = 6,
+    DeltaFragment = 6,
 };
 
 struct ContentRecord {