style, fix missing verb

Author: d-v-b

docs/developers/contributing.rst

@@ -315,9 +315,9 @@ The Zarr library is an implementation of a file format standard defined external
 
 
 If an existing Zarr file format version changes, or a new version of the Zarr file format is released, then the Zarr library will generally require changes. It is very likely that
-a new Zarr file format will require extensive breaking changes to the Zarr library, and so support for a new Zarr file format in the Zarr library will almost certainly come in a
-major version. For some period of time after the Zarr library adds support for a new Zarr file format,
-there may be a period of accelerated changes as developers refine APIs that were added to support the new format. Breaking changes may more frequent until a new API is fully stabilized, and these breaking changes may occur in ``minor`` releases.
+a new Zarr file format will require extensive breaking changes to the Zarr library, and so support for a new Zarr file format in the Zarr library will almost certainly come in new ``major`` release.
+For some period of time after the Zarr library adds support for a new Zarr file format, there may be a period of accelerated changes as developers refine APIs that were added to support the new format.
+Breaking changes may more frequent until a new API is fully stabilized, and these breaking changes may occur in ``minor`` releases.
 
 
 Release procedure