[DOC] RAPIDS 22.04 Release Blog Outline

[caryr35]

Provide bullet point list of major user facing changes to Sophie Watson by the end of **burn down**

[shwina]

Note that these are the most significant new features added in this release, but 22.04 was largely a maintenance release for cuDF Python.

cuDF Python:

• Enable read_text with dask_cudf using byte_range (Enable read_text with dask_cudf using byte_range #10407) @ChrisJar
• Enable numpy ufuncs for DataFrame (Enable numpy ufuncs for DataFrame #10287) @vyasr
• byte_range support for multibyte_split/read_text (byte_range support for multibyte_split/read_text #10150) @cwharris
• Add Dataframe and Index nunique (Add Dataframe and Index nunique #10077) @martinfalisse
• Support args= in Series.apply (Support args= in Series.apply #9982) @brandon-b-miller
• Add covariance for sort groupby (python) (Add covariance for sort groupby (python) #9889) @mayankanand007
• Implement DataFrame diff() (Implement DataFrame diff() #9817) @skirui-source
• Implement DataFrame pct_change (Implement DataFrame pct_change #9805) @skirui-source
• Add 'spearman' correlation method for dataframe.corr (Add 'spearman' correlation method for dataframe.corr and series.corr #7141) @dominicshanshan

[GregoryKimball]

libcudf:

• Support segmented reductions and null mask reductions (Support segmented reductions and null mask reductions #9621)
• Add libcudf strings split API that accepts regex pattern (Add libcudf strings split API that accepts regex pattern #10128)
• byte_range support for multibyte_split/read_text (byte_range support for multibyte_split/read_text #10150)
• Implement mixed equality/conditional semi/anti joins (Implement mixed equality/conditional semi/anti joins #10037)
• Optimize compaction operations (Optimize compaction operations #10030)

[github-actions]

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[beckernick]

Closing as completed. The 22.04 release blog is now available.