scripts/oss-fuzz: Fix typo in documentation

While we only use stdin, the chardev is named 'stdio'.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20210602170759.2500248-4-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

scripts/oss-fuzz/reorder_fuzzer_qtest_trace.py

@@ -14,7 +14,7 @@
         /path/to/crash 2> qtest_log_output
 scripts/oss-fuzz/reorder_fuzzer_qtest_trace.py qtest_log_output > qtest_trace
 ./i386-softmmu/qemu-fuzz-i386 -machine q35,accel=qtest \
-        -qtest stdin < qtest_trace
+        -qtest stdio < qtest_trace
 
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