Fix FUZZING.md typo.

Change-Id: Ie43ffabfdf5b10fbb0c8adcc2626a2913152e5e1
Reviewed-on: https://boringssl-review.googlesource.com/14525
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
diff --git a/FUZZING.md b/FUZZING.md
index 70660ab..abf5d97 100644
--- a/FUZZING.md
+++ b/FUZZING.md
@@ -80,5 +80,5 @@
 
 ```
 cd fuzz
-./refresh_fuzzer_corpora.sh /path/to/fuzzer/mode/build /path/to/non/fuzzer/mode/build
+./refresh_ssl_corpora.sh /path/to/fuzzer/mode/build /path/to/non/fuzzer/mode/build
 ```