[clang-tidy] Use relative URL for redirection.

llvm-svn: 258925
diff --git a/clang-tools-extra/docs/clang-tidy.rst b/clang-tools-extra/docs/clang-tidy.rst
index 5fcfa7f..bcd2bf1 100644
--- a/clang-tools-extra/docs/clang-tidy.rst
+++ b/clang-tools-extra/docs/clang-tidy.rst
@@ -1,6 +1,6 @@
 :orphan:
 
 .. meta::
-   :http-equiv=refresh: 0;URL='http://clang.llvm.org/extra/clang-tidy/'
+   :http-equiv=refresh: 0;URL='clang-tidy/'
 
 clang-tidy documentation has moved here: http://clang.llvm.org/extra/clang-tidy/