Fix Clang sphinx build
This addresses the issue found in:
https://lab.llvm.org/buildbot/#/builders/92/builds/39306
diff --git a/clang/docs/SourceBasedCodeCoverage.rst b/clang/docs/SourceBasedCodeCoverage.rst
index 3a5d1ce..d1d819b 100644
--- a/clang/docs/SourceBasedCodeCoverage.rst
+++ b/clang/docs/SourceBasedCodeCoverage.rst
@@ -127,11 +127,11 @@
other platforms by passing the ``-runtime-counter-relocation`` option to the
backend during compilation.
-For a program such as the :doc:`Lit <CommandGuide/lit>` testing tool which
-invokes other programs, it may be necessary to set ``LLVM_PROFILE_FILE`` for
-each invocation. The pattern strings "%p" or "%Nm" may help to avoid
-corruption due to concurrency. Note that "%p" is also a Lit token and needs
-to be escaped as "%%p".
+For a program such as the `Lit <https://llvm.org/docs/CommandGuide/lit.html>`_
+testing tool which invokes other programs, it may be necessary to set
+``LLVM_PROFILE_FILE`` for each invocation. The pattern strings "%p" or "%Nm"
+may help to avoid corruption due to concurrency. Note that "%p" is also a Lit
+token and needs to be escaped as "%%p".
.. code-block:: console
