docs: add warning about incompatibility with CUDA versions > 11.3

See inducer/pycuda#123

docs/source/features.rst

@@ -158,6 +158,11 @@ Real-time image correlation
      that it still works as expected ! On the long-term, it should be replaced
      by another Block.
 
+  .. Warning::
+     This Block cannot run with CUDA versions greater than 11.3 ! This is due
+     to a deprecation in pycuda, and is unlikely to be fixed anytime soon in
+     Crappy or pycuda.
+
 Video-extensometry
 ++++++++++++++++++
 
@@ -201,6 +206,11 @@ Video-extensometry
      that it still works as expected ! On the long-term, it should be replaced
      by another Block.
 
+  .. Warning::
+     This Block cannot run with CUDA versions greater than 11.3 ! This is due
+     to a deprecation in pycuda, and is unlikely to be fixed anytime soon in
+     Crappy or pycuda.
+
 - :ref:`Video Extenso`
 
   Child of the :ref:`Camera` Block that can acquire, record and display images.

src/crappy/blocks/gpu_correl.py

@@ -34,6 +34,11 @@ class GPUCorrel(Camera):
   correlation is performed on the entire image. It is however possible to set
   a mask, so that only part of the image is considered when running the
   correlation.
+
+  Warning:
+    This Block cannot run with CUDA versions greater than 11.3 ! This is due to
+    a deprecation in pycuda, and is unlikely to be fixed anytime soon in Crappy
+    or pycuda.
   
   .. versionadded:: 1.4.0
   """

src/crappy/blocks/gpu_ve.py

@@ -29,6 +29,11 @@ class GPUVE(Camera):
   also performs video-extensometry, but it does so by tracking spots instead
   of textured patches, and it is not GPU-accelerated.
 
+  Warning:
+    This Block cannot run with CUDA versions greater than 11.3 ! This is due to
+    a deprecation in pycuda, and is unlikely to be fixed anytime soon in Crappy
+    or pycuda.
+
   .. versionadded:: 1.4.0
   """