Fix typo

Author: liufengyun

compiler/test/dotty/tools/dotc/CompilationTests.scala

@@ -146,7 +146,7 @@ class CompilationTests extends ParallelTesting {
     compileFilesInDir("tests/neg", defaultOptions) +
     compileFilesInDir("tests/neg-tailcall", defaultOptions) +
     compileFilesInDir("tests/neg-kind-polymorphism", defaultOptions and "-Ykind-polymorphism") +
-    compileDir("tests/neg-custom-args/deprecate", defaultOptions.and("-Xfatal-warnings", "-deprecation")) +
+    compileDir("tests/neg-custom-args/deprecation", defaultOptions.and("-Xfatal-warnings", "-deprecation")) +
     compileFilesInDir("tests/neg-custom-args/fatal-warnings", defaultOptions.and("-Xfatal-warnings")) +
     compileFilesInDir("tests/neg-custom-args/allow-double-bindings", allowDoubleBindings) +
     compileDir("tests/neg-custom-args/impl-conv", defaultOptions.and("-Xfatal-warnings", "-feature")) +