Documentation: KUnit: update links in the index page

Replace out-of-date external links with references to the kernel
documentation, replacing TAP webpage for the more appropriate KTAP
documentation and the UML webpage by its documentation.
Signed-off-by: Tales Aparecida <tales.aparecida@gmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Documentation/dev-tools/kunit/index.rst

@@ -28,10 +28,10 @@ KUnit (Kernel unit testing framework) provides a common framework for
 unit tests within the Linux kernel. Using KUnit, you can define groups
 of test cases called test suites. The tests either run on kernel boot
 if built-in, or load as a module. KUnit automatically flags and reports
-failed test cases in the kernel log. The test results appear in `TAP
-(Test Anything Protocol) format <https://testanything.org/>`_. It is inspired by
-JUnit, Python’s unittest.mock, and GoogleTest/GoogleMock (C++ unit testing
-framework).
+failed test cases in the kernel log. The test results appear in
+:doc:`KTAP (Kernel - Test Anything Protocol) format</dev-tools/ktap>`.
+It is inspired by JUnit, Python’s unittest.mock, and GoogleTest/GoogleMock
+(C++ unit testing framework).
 
 KUnit tests are part of the kernel, written in the C (programming)
 language, and test parts of the Kernel implementation (example: a C
@@ -45,8 +45,9 @@ internal system functionality. KUnit runs in kernel space and is not
 restricted to things exposed to user-space.
 
 In addition, KUnit has kunit_tool, a script (``tools/testing/kunit/kunit.py``)
-that configures the Linux kernel, runs KUnit tests under QEMU or UML (`User Mode
-Linux <http://user-mode-linux.sourceforge.net/>`_), parses the test results and
+that configures the Linux kernel, runs KUnit tests under QEMU or UML
+(:doc:`User Mode Linux </virt/uml/user_mode_linux_howto_v2>`),
+parses the test results and
 displays them in a user friendly manner.
 
 Features