update black to 22.3.0

- fixes error in CI
- see https://github.com/psf/black/issues/2964

docker/Dockerfile

@@ -39,7 +39,7 @@ RUN apt-get update && \
 
 RUN pip3 install \
   mypy==0.790 \
-  black==20.8b1 \
+  black==22.3.0 \
   pylint==2.6.0 \
   sympy==1.7.1 \
   vtk==9.1.0 \
@@ -49,4 +49,4 @@ RUN apt-get update && \
   DEBIAN_FRONTEND="noninteractive" \
   apt-get install -y \
   libpetsc-${PETSC_SCALAR_TYPE}-dev \
-  libslepc-${PETSC_SCALAR_TYPE}3.12-dev
\ No newline at end of file
+  libslepc-${PETSC_SCALAR_TYPE}3.12-dev