minor: use s/http/https in github URL

Signed-off-by: Daniel Latypov <dlatypov@google.com>
Change-Id: I9e4ccce2be7a91e742f9c29614f1188a6afae104
diff --git a/README.md b/README.md
index e563de4..5a38ca5 100644
--- a/README.md
+++ b/README.md
@@ -36,12 +36,12 @@
 
 ## How to update the documentation
 
-Our documentation is hosted at <http://github.com/google/kunit-docs>. The
+Our documentation is hosted at <https://github.com/google/kunit-docs>. The
 documentation may be updated by building the documentation as described above,
 and then:
 
 ```bash
-git clone http://github.com/google/kunit-docs.git
+git clone https://github.com/google/kunit-docs.git
 cd kunit-docs/
 git ls-files -z | xargs -0 rm -f
 cp -r ../kunit-website/_build/html/. ./