Update changelog and matrix table for v1.0.0-alpha.1 (#7274)

Signed-off-by: Ricardo Pchevuzinske Katz <[email protected]>

Author: rikatz

Changelog.md

@@ -1,5 +1,18 @@
 # Changelog
 
+### 1.0.0-alpha.1
+**THIS IS A BREAKING CHANGE**
+
+This release only supports Kubernetes versions >= v1.19. The support for Ingress Object in `networking.k8s.io/v1beta` is being dropped and manifests should now use `networking.k8s.io/v1`.
+
+**Image:**
+
+- `k8s.gcr.io/ingress-nginx/controller:v1.0.0-alpha.1@sha256:32f3f02a038c0d7cf33b71a14028c3a4ddee6f4c3fe5fadfa14b915e5e0d9faf`
+
+_ New Features:_
+
+- [X] [#7156] Drops support for Ingress Object v1beta1
+
 ### 0.47.0
 
 **Image:**

README.md

@@ -39,6 +39,7 @@ For detailed changes on the `ingress-nginx` helm chart, please check the followi
 
 | Ingress-nginx version | k8s supported version | Alpine Version | Nginx Version |
 |-----------------------|-------------          |----------------|---------------|
+| v1.0.0-alpha.1        | 1.21, 1.20, 1.19      | 3.13.5         |  1.20.1       |
 | v0.47.0               | 1.21, 1.20, 1.19      | 3.13.5         |  1.20.1       |
 | v0.46.0               | 1.21, 1.20, 1.19      | 3.13.2         |  1.19.6       |
 | v0.45.0               | 1.21, 1.20, 1.19      | 3.13.2         |  1.19.6       |