Fix sktime constraint on pycatch22

[tm-slavik57]

The pycatch22 constraint of sktime has a redundant comma at the end which breaks conda installations.

Relates to these:

• [BUG] Version 0.28.0 conda release, all extras dep set sktime-all-extras, does not install on windows due to broken pycatch22 specification identifier sktime/sktime#6304
• InvalidSpec error for spec ">=0.4,<0.4.4" in sktime conda/conda-build#5302
• fix pycatch22 specifier sktime-feedstock#118

Output of the show_diff.py script I ran locally:

$ python show_diff.py 
================================================================================
================================================================================
linux-armv7l
================================================================================
================================================================================
win-32
================================================================================
================================================================================
osx-arm64
osx-arm64::sktime-0.28.0-py38h10201cd_0.conda
osx-arm64::sktime-0.28.0-py310hbe9552e_0.conda
osx-arm64::sktime-0.28.0-py39h2804cbe_0.conda
osx-arm64::sktime-0.28.0-py311h267d04e_0.conda
-    "pycatch22 >=0.4,<0.4.4,",
+    "pycatch22 >=0.4,<0.4.4",
================================================================================
================================================================================
linux-ppc64le
================================================================================
================================================================================
linux-aarch64
linux-aarch64::sktime-0.28.0-py310h4c7bcd0_0.conda
linux-aarch64::sktime-0.28.0-py38he3eb160_0.conda
linux-aarch64::sktime-0.28.0-py39h4420490_0.conda
linux-aarch64::sktime-0.28.0-py311hec3470c_0.conda
-    "pycatch22 >=0.4,<0.4.4,",
+    "pycatch22 >=0.4,<0.4.4",
================================================================================
================================================================================
noarch
================================================================================
================================================================================
win-64
win-64::sktime-0.28.0-py39hcbf5309_0.conda
win-64::sktime-0.28.0-py311h1ea47a8_0.conda
win-64::sktime-0.28.0-py310h5588dad_0.conda
win-64::sktime-0.28.0-py38haa244fe_0.conda
-    "pycatch22 >=0.4,<0.4.4,",
+    "pycatch22 >=0.4,<0.4.4",
================================================================================
================================================================================
osx-64
osx-64::sktime-0.28.0-py39h6e9494a_0.conda
osx-64::sktime-0.28.0-py311h6eed73b_0.conda
osx-64::sktime-0.28.0-py38h50d1736_0.conda
osx-64::sktime-0.28.0-py310h2ec42d9_0.conda
-    "pycatch22 >=0.4,<0.4.4,",
+    "pycatch22 >=0.4,<0.4.4",
================================================================================
================================================================================
linux-64
linux-64::sktime-0.28.0-py39hf3d152e_0.conda
linux-64::sktime-0.28.0-py38h578d9bd_0.conda
linux-64::sktime-0.28.0-py311h38be061_0.conda
linux-64::sktime-0.28.0-py310hff52083_0.conda
-    "pycatch22 >=0.4,<0.4.4,",
+    "pycatch22 >=0.4,<0.4.4",

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[tm-slavik57]

@fkiraly
This PR patches this bug: sktime/sktime#6304