docs: Decouple refrences from /docs folder

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I1955201382074eb9e6dd80aadbc456eb09aecb22
diff --git a/docs/technical_references/design_docs/ff_isolation.rst b/docs/technical_references/design_docs/ff_isolation.rst
index 41dd4fc..daa8b48 100644
--- a/docs/technical_references/design_docs/ff_isolation.rst
+++ b/docs/technical_references/design_docs/ff_isolation.rst
@@ -10,7 +10,7 @@
 complies the rules by operating the hardware and software resources.
 
 .. note::
-  Reference the document :doc:`Glossary </docs/glossary>` for terms
+  Reference the document :doc:`Glossary </glossary>` for terms
   and abbreviations.
 
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