Add missing list filling header in meta.yaml

[devavret]

Style check was failing in the last couple of PRs but not loudly enough to break CI.

[codecov]

Codecov Report

Merging #10007 (11ef9a3) into branch-22.02 (967a333) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-22.02   #10007      +/-   ##
================================================
- Coverage         10.49%   10.42%   -0.07%     
================================================
  Files               119      119              
  Lines             20305    20471     +166     
================================================
+ Hits               2130     2134       +4     
- Misses            18175    18337     +162     

Impacted Files	Coverage Δ
python/custreamz/custreamz/kafka.py	29.16% <0.00%> (-0.63%)	⬇️
python/dask_cudf/dask_cudf/sorting.py	92.30% <0.00%> (-0.61%)	⬇️
python/cudf/cudf/__init__.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/frame.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/index.py	0.00% <0.00%> (ø)
python/cudf/cudf/io/parquet.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/series.py	0.00% <0.00%> (ø)
python/cudf/cudf/utils/utils.py	0.00% <0.00%> (ø)
python/cudf/cudf/utils/dtypes.py	0.00% <0.00%> (ø)
python/cudf/cudf/utils/ioutils.py	0.00% <0.00%> (ø)
... and 19 more

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[devavret]

@gpucibot merge