Fix typo

Author: javiereguiluz

src/TwigComponent/doc/index.rst

@@ -1591,7 +1591,7 @@ important caveats:
 #. The original parent component variables are available via the special
    :ref:`outerScope variable <embedded-components-outerScope>`, so you can, for
    example, call ``outerScope.this.someFunction()``;
-#. The contents of blocks defined in parent components are avaialble via the
+#. The contents of blocks defined in parent components are available via the
    special :ref:`outerBlocks variable <embedded-components-outerBlocks>`, so you
    can call ``block(outerBlocks.someBlockName)``.