Update release notes for v3.1.0

CHANGELOG.md

@@ -1,5 +1,24 @@
 # Vx.x.x (Pre-release)
 
+## Changes since v3.1.0
+
+# v3.1.0
+
+## Release highlights
+
+- Introduction of ARM releases and and general improvements to Docker builds
+- Improvements to OIDC provider allowing pass-through of ID Tokens
+- Multiple redirect domains can now be whitelisted
+- Streamed responses are now flushed periodically
+
+## Important notes
+
+If you have been using [#bitly/621](https://github.com/bitly/oauth2_proxy/pull/621)
+and have cookies larger than the 4kb limit,
+the cookie splitting pattern has changed and now uses `_` in place of `-` when
+indexing cookies.
+This will force users to reauthenticate the first time they use `v3.1.0`.
+
 ## Changes since v3.0.0
 
 - [#14](https://github.com/pusher/oauth2_proxy/pull/14) OIDC ID Token, Authorization Headers, Refreshing and Verification (@joelspeed)

README.md

@@ -19,17 +19,17 @@ A list of changes can be seen in the [CHANGELOG](CHANGELOG.md).
 
 1.  Choose how to deploy:
 
-    a. Download [Prebuilt Binary](https://github.com/pusher/oauth2_proxy/releases) (current release is `v3.0.0`)
+    a. Download [Prebuilt Binary](https://github.com/pusher/oauth2_proxy/releases) (current release is `v3.1.0`)
 
     b. Build with `$ go get github.com/pusher/oauth2_proxy` which will put the binary in `$GOROOT/bin`
 
-    c. Using the prebuilt docker image [quay.io/pusher/oauth2_proxy](https://quay.io/pusher/oauth2_proxy)
+    c. Using the prebuilt docker image [quay.io/pusher/oauth2_proxy](https://quay.io/pusher/oauth2_proxy) (AMD64, ARMv6 and ARM64 tags available)
 
 Prebuilt binaries can be validated by extracting the file and verifying it against the `sha256sum.txt` checksum file provided for each release starting with version `v3.0.0`.
 
 ```
 sha256sum -c sha256sum.txt 2>&1 | grep OK
-oauth2_proxy-3.0.0.linux-amd64: OK
+oauth2_proxy-3.1.0.linux-amd64: OK
 ```
 
 2.  Select a Provider and Register an OAuth Application with a Provider