NCBI taxonomy will append a list of 42 names of prokaryote phyla published for validation purposes as required under the International Code of Nomenclature for Prokaryotes.
The newly adjusted rule (Rule 8) in the ICNP requires all formal rank names to be formed by the addition of the suffix “ -ota” to the stem of the name of the designated type genus.

Table: Part of the new phyla name

Current name New name
Firmicutes Bacillota
Proteobacteria Pseudomonadota
Actinobacteria Actinomycetota
Bacteroidetes Bacteroidota

See NCBI Taxonomy to include phylum rank in taxonomic names for details.