[clang] [docs] Fix markdown migration defects in the user manual (PR #210785)

[Reid Kleckner via cfe-commits]

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@@ -3816,10 +3674,10 @@ if the `clang` is not compiling for profile generation.
 Such replacement can happen because `clang` adds one of two macros depending
 on the `-fprofile-generate` and the `-fprofile-use` flags.
 
-> - `__LLVM_INSTR_PROFILE_GENERATE`: defined when one of
->   `-fprofile[-instr]-generate`/`-fcs-profile-generate` is in effect.
-> - `__LLVM_INSTR_PROFILE_USE`: defined when one of
->   `-fprofile-use`/`-fprofile-instr-use` is in effect.
+- `__LLVM_INSTR_PROFILE_GENERATE`: defined when one of
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rnk wrote:

ditto

https://github.com/llvm/llvm-project/pull/210785