Fix error message when vision distribution is missing (#340)

src/eva/vision/__init__.py

@@ -7,7 +7,7 @@
     msg = (
         "eva vision requirements are not installed.\n\n"
         "Please pip install as follows:\n"
-        '  python -m pip install "eva[vision]" --upgrade'
+        '  python -m pip install "kaiko-eva[vision]" --upgrade'
     )
     raise ImportError(str(e) + "\n\n" + msg) from e