Bump haddock submodule

to get this commit:

    commit 0952d94a2e30a3e7cddbede811b15fa70f7b9462 (HEAD)
    Author: Joachim Breitner <mail@joachim-breitner.de>
    Date:   Tue Jan 19 11:39:38 2021 +0100

        Make haddock more robust to changes to the `Language` data type

        With the introduction of GHC2021, the `Languages` data type in GHC will
        grow. In preparation of that (and to avoid changing haddock with each
        new language), this change makes the code handle extensions to that data
        type gracefully.

        (cherry picked from commit c341dd7c9c3fc5ebc83a2d577c5a726f3eb152a5)

This can go in as preparation for !4853

1 files changed, 0 insertions, 0 deletions

diff --git a/utils/haddock b/utils/haddock
-Subproject 7a79b5b7061333868bee5a3273fea5f47fe0335
+Subproject 44cb750b563b303195cd01fae5db97b5f16382c