UefiCpuPkg/UefiCpuPkg.ci.yaml: Ignore RISC-V file

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076

RISC-V register names do not follow the EDK2 formatting.
So, add it to ignore list for now.

Cc: Eric Dong <[email protected]>
Cc: Ray Ni <[email protected]>
Cc: Rahul Kumar <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Signed-off-by: Sunil V L <[email protected]>
Acked-by: Abner Chang <[email protected]>
Reviewed-by: Andrei Warkentin <[email protected]>
Reviewed-by: Michael D Kinney <[email protected]>
Acked-by: Ray Ni <[email protected]>

UefiCpuPkg/UefiCpuPkg.ci.yaml

@@ -27,6 +27,7 @@
         ],
         ## Both file path and directory path are accepted.
         "IgnoreFiles": [
+          "Library/BaseRiscV64CpuExceptionHandlerLib/CpuExceptionHandlerLib.h"
         ]
     },
     "CompilerPlugin": {