call out lockfile changes as major change

NEWS.md

@@ -1,8 +1,19 @@
 
 # renv 1.1.0  (UNRELEASED)
 
-* `renv` now includes the contents of each package's DESCRIPTION file in
-  the package records for generated lockfiles. (#2057)
+## Major Changes
+
+* `renv` now includes additional package DESCRIPTION fields in the lockfile.
+  This can be useful for validating the provenance of packages recorded in the
+  lockfile, and also for applications using `renv` which would like to
+  recompute the hash used for package caching from the lockfile itself.
+
+  If needed, old-style lockfiles can be generated by setting the option
+  `options(renv.lockfile.version = 1)`. Note that this version of `renv`
+  remains compatible both with the older (minimal) lockfiles, as well
+  as with the newer lockfiles in this release. (#2057)
+
+## Other Fixes
 
 * Fixed an issue where `renv::snapshot()` could fail if invoked within
   a project containing empty or invalid `.ipynb` files. (#2073)