README.md: fix typo

The default output of the edk2 test parser is called `result.md'.
Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>

README.md

@@ -35,7 +35,7 @@ For ACS-ES and ACS-IR, under the `acs_results` partition:
     /uefi
     /uefi_dump
 
-For ACS-IR, also include the `results.md` output from running the SCT results
+For ACS-IR, also include the `result.md` output from running the SCT results
 parser script from https://gitlab.arm.com/systemready/edk2-test-parser.
 
 ### `./manual-results/`
@@ -238,7 +238,7 @@ For IR, after collecting the results the directory tree should look like this:
 .
 ├── acs-console.log
 ├── acs_results/
-│   ├── results.md
+│   ├── result.md
 │   ├── app_output/
 │   │   ├── CapsuleApp_ESRT_table_info.log
 │   │   └── CapsuleApp_FMP_protocol_info.log