Update markdown

Author: jkoritzinsky

docs/design/coreclr/botr/readytorun-platform-native-envelope.md

@@ -13,9 +13,11 @@ The tentative high-level design is outlined below. As we implement this support,
 ## crossgen2: producing Mach-O object files
 
 Mach‑O support will only be supported for composite ReadyToRun when the target OS is macOS. It will be opt-in via a new `crossgen2` flag:
+
 - `--obj-format macho`
 
 `crossgen2` will:
+
 - Produce a Mach-O object file as the composite R2R image with the `RTR_HEADER` export for the `READYTORUN_HEADER`.
 - Mark each input IL assembly as a component R2R assembly: `READYTORUN_FLAG_COMPONENT`.
 - Mark each input IL assembly with a new flag indicating that the associated composite image is in the platform-native format: `READYTORUN_FLAG_PLATFORM_NATIVE_IMAGE`
@@ -28,20 +30,14 @@ There's a few cases in the R2R format that are not natively represented in the M
 
 #### Sections
 
-Sections folded into `__TEXT,__text` that is in other sections in the PE envelope:
-
-- CLR metadata: In the PE format, put in .cormeta, corresponds to the PE Header's "COR Header directory"
-- Win32 Resources: In the PE format, put in .rsrc, corresponds to the PE Header's "Win32 Resources Header directory"
-- Managed Unwind Info: In the Mach-O format, this section is expected to be in the Mach-O unwind format. The unwind info used by the runtime must be in the Windows unwind format.
-- GC Info: Entries correspond to the unwind info.
 
 Data moved out of `__TEXT,__text`:
 
 - Precompiled managed code has been moved into `__TEXT,__managedcode`. `__TEXT,__text` gets special treatment by the linker and `__TEXT,__managedcode` matches NativeAOT.
+- Read-only data such as jump tables, CLR metadata, Win32 Resources, managed unwind info, gc info, and the R2R headers are moved to `__TEXT,__const`
 
 Data that stays in the corresponding locations as the PE envelope:
 
-- Read-only data such as jump tables and the R2R headers: `__TEXT,__const`
 - Read-write data, such as fixup tables: `__DATA,__data`
 - Import thunks: `__TEXT,__text`