gh-86404: [doc] Two 'make suspicious' false positives. (GH-94407)

Author: JulienPalard

Doc/tools/susp-ignored.csv

@@ -396,3 +396,5 @@ library/typing,,`,"assert_type(name, str)  # OK, inferred type of `name` is `str
 library/typing,,`,# after which we hope the inferred type will be `int`
 whatsnew/changelog,,:company,-V:company/tag
 library/typing,,`,# are located in the `typing_extensions` backports package.
+library/dis,490,:TOS,TOS = TOS2[TOS1:TOS]
+library/dis,497,:TOS,TOS2[TOS1:TOS] = TOS3