Update losses doc (#6691)

Fixes #6682.

### Description

Add DeepSupervisionLoss in the doc

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Integration tests passed locally by running `./runtests.sh -f -u--net --coverage`.
- [ ] Quick tests passed locally by running `./runtests.sh --quick
--unittests --disttests`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated, tested `make html` command in the `docs/`
folder.

---------

Signed-off-by: HussainAlasmawi <[email protected]>

Author: HussainAlasmawi

docs/source/losses.rst

@@ -112,3 +112,8 @@ Loss Wrappers
 ~~~~~~~~~~~~
 .. autoclass:: MaskedLoss
     :members:
+
+`DeepSupervisionLoss`
+~~~~~~~~~~~~~~~~~~~~~
+.. autoclass:: DeepSupervisionLoss
+    :members:

tests/test_vitautoenc.py

@@ -17,7 +17,7 @@
 
 from monai.networks import eval_mode
 from monai.networks.nets.vitautoenc import ViTAutoEnc
-from tests.utils import skip_if_windows
+from tests.utils import skip_if_quick, skip_if_windows
 
 TEST_CASE_Vitautoenc = []
 for in_channels in [1, 4]:
@@ -64,7 +64,8 @@
 )
 
 
-class TestPatchEmbeddingBlock(unittest.TestCase):
+@skip_if_quick
+class TestVitAutoenc(unittest.TestCase):
     def setUp(self):
         self.threads = torch.get_num_threads()
         torch.set_num_threads(4)