Date the 2027.1.1 changelog for the release

CHANGELOG.md

@@ -5,7 +5,11 @@ Every package releases together, at one version
 that changes something consumers notice adds a line under the next version's heading. `release.yml` publishes a
 version's section as its GitHub release notes.
 
-## 2027.1.1
+## 2027.1.1 (2026-10-13)
+
+Fixes for the two things 2027.1.0 left open: an append ends the same way on every provider when another writer gets
+there first, and a Physical folder delete can no longer be steered outside the root by a link swapped in while it runs.
+Nothing breaks; Physical's tests now also run on macOS and on Linux on Arm64.
 
 ### Fixed
 

docs/plans/2026-10-13-2027-1-1.md

@@ -486,3 +486,6 @@ expectation (the winner is done before the loser retries); the locked restore of
   Round 2: F1 to F7 verified. G1, an empty listed name would reopen the folder itself on Windows, refused as a name with
   a separator is; G2, the check for a name gone after a refused removal looks it up in the extended form on Windows,
   which keeps a trailing dot or space, with a test; nits. Round 3: G1 to G3 verified, clean; one test nit applied.
+  Merged as #76.
+- **2026-10-13, step 4:** the changelog's 2027.1.1 section dated, with a short intro; `v2027.1.1-rc.1`, then
+  `v2027.1.1`, are tagged on this PR's merge commit.