Prepare v0.60.0 release

Signed-off-by: Ashutosh Narkar <anarkar4387@gmail.com>

CHANGELOG.md

@@ -3,7 +3,36 @@
 All notable changes to this project will be documented in this file. This
 project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## 0.60.0
+
+### Runtime, Tooling, SDK
+- OPA can be run in 1.0 compatibility mode by using the new `--v1-compatible` flag. When this mode is enabled, the current release of OPA will behave as OPA `v1.0` will eventually behave by default. This flag is currently supported on the `build`, `check`, `fmt`, `eval` and `test` commands ([#6478](https://github.com/open-policy-agent/opa/pull/6478)) authored by @johanfylling
+- Extend the telemetry report to include the minimum compatible version of policies loaded into OPA ([#6361](https://github.com/open-policy-agent/opa/issues/6361)) co-authored by @srenatus and @ashutosh-narkar
+- server: Support fsnotify based reloading of certificate, key and CA cert pool when they change on disk ([#5788](https://github.com/open-policy-agent/opa/issues/5788)) authored by @charlieegan3
+- Add option on the unit test runner to surface builtin errors. This should help with debugging errors generated while running unit tests ([#6489](https://github.com/open-policy-agent/opa/issues/6489)) authored by @jalseth
+- Fix issue in `opa fmt` where the assignment operator and term in the rule head of chain rules are removed from the re-written rule head  ([#6467](https://github.com/open-policy-agent/opa/issues/6467)) authored by @anderseknert
+- cmd/fmt: Replace dependency on `diff` tool with an external golang library function ([#6284](https://github.com/open-policy-agent/opa/issues/6284)) authored by @colinjlacy
+
+### Topdown and Rego
+- topdown/providers: Preserve user provided http headers in the `providers.aws.sign_req` builtin command ([#6456](https://github.com/open-policy-agent/opa/pull/6456)) authored by @c2zwdjnlcg
+- rego: Allow custom builtin function registration to provide a description for the builtin ([#6449](https://github.com/open-policy-agent/opa/issues/6449)) authored by @lcarva
+- ast+cmd: Allow bundle to contain calls to unknown functions when inspected ([#6457](https://github.com/open-policy-agent/opa/issues/6457)) authored by @johanfylling
+
+### Docs
+- Add section on the changes proposed for a future OPA v1.0 and update Rego examples to be OPA v1.0 compliant([#6453](https://github.com/open-policy-agent/opa/issues/6453)) authored by @johanfylling
+- Clarify behavior of the `sprintf` builtin command when used with the `%T` marker ([#6487](https://github.com/open-policy-agent/opa/issues/6487)) authored by @lcarva
+
+### Website + Ecosystem
+- Ecosystem: Digger ([#6464](https://github.com/open-policy-agent/opa/pull/6464)) authored by @anderseknert
+
+### Miscellaneous
+- Update `Makefile` to allow custom `GOFLAGS` to be provided to the golang executable ([#6458](https://github.com/open-policy-agent/opa/issues/6458)) authored by @cova-fe
+- Dependency updates; notably:
+  - bump golang 1.21.4 -> 1.21.5 ([#6460](https://github.com/open-policy-agent/opa/pull/6460)) authored by @srenatus
+  - bump aquasecurity/trivy-action from 0.14.0 to 0.16.0
+  - bump github.com/containerd/containerd from 1.7.9 to 1.7.11
+  - bump google.golang.org/grpc from 1.59.0 to 1.60.1
+  - bump github.com/google/uuid from 1.4.0 to 1.5.0
 
 ## 0.59.0