fix docstring in get_acquisition_function (#1965)

Summary:
## Motivation

When working through the release notes for 0.9.0, I encountered this faulty docstring.
### Have you read the [Contributing Guidelines on pull requests](https://github.com/pytorch/botorch/blob/main/CONTRIBUTING.md#pull-requests)?

Yes.

Pull Request resolved: #1965

Test Plan: Not needed.

Reviewed By: saitcakmak

Differential Revision: D47993389

Pulled By: Balandat

fbshipit-source-id: 65a18a108115718468b1c2da223c16dc6c0bc1a8

Author: jduerholt

botorch/acquisition/utils.py

@@ -65,13 +65,13 @@ def get_acquisition_function(
         constraints: A list of callables, each mapping a Tensor of dimension
             `sample_shape x batch-shape x q x m` to a Tensor of dimension
             `sample_shape x batch-shape x q`, where negative values imply
-            feasibility. Used only for qEHVI and qNEHVI.
+            feasibility. Used for all acquisition functions except qSR and qUCB.
         eta: The temperature parameter for the sigmoid function used for the
             differentiable approximation of the constraints. In case of a float the
             same eta is used for every constraint in constraints. In case of a
             tensor the length of the tensor must match the number of provided
             constraints. The i-th constraint is then estimated with the i-th
-            eta value. Used only for qEHVI and qNEHVI.
+            eta value. Used for all acquisition functions except qSR and qUCB.
         mc_samples: The number of samples to use for (q)MC evaluation of the
             acquisition function.
         seed: If provided, perform deterministic optimization (i.e. the