Merge pull request #6670 from anhu/080

Document that we integrate with liboqs 0.8.0

Author: JacobBarthelmeh

INSTALL

@@ -150,7 +150,7 @@
     $ cd ~/oqs
     $ git clone --single-branch https://github.com/open-quantum-safe/liboqs.git
     $ cd liboqs/
-    $ git checkout af76ca3b1f2fbc1f4f0967595f3bb07692fb3d82
+    $ git checkout 0.8.0
     $ mkdir build
     $ cd build
     $ cmake -DOQS_USE_OPENSSL=0 ..