Update readme for alpine rebase/nightly-alpine deprecate

README.md

@@ -66,7 +66,6 @@ This image provides various versions that are available via tags. Please read th
 | :----: | :----: |--- |
 | latest | ❌ | |
 | nightly | ✅ | Nightly Readarr releases |
-| nightly-alpine | ✅ | Nightly Readarr releases using our Alpine baseimage |
 
 ## Application Setup
 
@@ -245,6 +244,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **21.01.22:** - Rebase nightly branch to Alpine & deprecate nightly-alpine branch.
 * **21.01.22:** - Remove chromaprint as it's no longer a required dependency.
 * **01.01.22:** - Add chromaprint for audio fingerprinting.
 * **30.12.21:** - Add nightly-alpine branch.