Rename main branch in CHANGELOG and website docs

CHANGELOG.md

@@ -1752,7 +1752,7 @@ SECURITY:
 IMPROVEMENTS:
 
 * build: Bumped Go version to 1.10 [[GH-3988](https://github.com/hashicorp/consul/pull/3988)]
-* agent: Blocking queries on service-specific health and catalog endpoints now return a per-service `X-Consul-Index` improving watch performance on very busy clusters. [[GH-3890](https://github.com/hashicorp/consul/issues/3890)]. **Note this may break blocking clients that relied on undocumented implementation details** as noted in the [upgrade docs](https://github.com/hashicorp/consul/blob/master/website/source/docs/upgrading.html.md#upgrade-from-version-106-to-higher).
+* agent: Blocking queries on service-specific health and catalog endpoints now return a per-service `X-Consul-Index` improving watch performance on very busy clusters. [[GH-3890](https://github.com/hashicorp/consul/issues/3890)]. **Note this may break blocking clients that relied on undocumented implementation details** as noted in the [upgrade docs](https://github.com/hashicorp/consul/blob/main/website/source/docs/upgrading.html.md#upgrade-from-version-106-to-higher).
 * agent: All endpoints now respond to OPTIONS requests. [[GH-3885](https://github.com/hashicorp/consul/issues/3885)]
 * agent: List of supported TLS cipher suites updated to include newer options, [[GH-3962](https://github.com/hashicorp/consul/pull/3962)]
 * agent: WAN federation can now be disabled by setting the serf WAN port to -1. [[GH-3984](https://github.com/hashicorp/consul/issues/3984)]
@@ -1934,12 +1934,12 @@ BREAKING CHANGES:
     | `dogstatsd_tags` | [`telemetry.dogstatsd_tags`](https://www.consul.io/docs/agent/options.html#telemetry-dogstatsd_tags) |
     | `http_api_response_headers` | [`http_config.response_headers`](https://www.consul.io/docs/agent/options.html#response_headers) |
     | `ports.rpc` | None, the RPC server for CLI commands is no longer supported. |
-    | `recursor` | [`recursors`](https://github.com/hashicorp/consul/blob/master/website/source/docs/agent/options.html.md#recursors) |
+    | `recursor` | [`recursors`](https://github.com/hashicorp/consul/blob/main/website/source/docs/agent/options.html.md#recursors) |
     | `retry_join_azure` | [`-retry-join`](https://www.consul.io/docs/agent/options.html#microsoft-azure) |
     | `retry_join_ec2` | [`-retry-join`](https://www.consul.io/docs/agent/options.html#amazon-ec2) |
     | `retry_join_gce` | [`-retry-join`](https://www.consul.io/docs/agent/options.html#google-compute-engine) |
-    | `statsd_addr` | [`telemetry.statsd_address`](https://github.com/hashicorp/consul/blob/master/website/source/docs/agent/options.html.md#telemetry-statsd_address) |
-    | `statsite_addr` | [`telemetry.statsite_address`](https://github.com/hashicorp/consul/blob/master/website/source/docs/agent/options.html.md#telemetry-statsite_address) |
+    | `statsd_addr` | [`telemetry.statsd_address`](https://github.com/hashicorp/consul/blob/main/website/source/docs/agent/options.html.md#telemetry-statsd_address) |
+    | `statsite_addr` | [`telemetry.statsite_address`](https://github.com/hashicorp/consul/blob/main/website/source/docs/agent/options.html.md#telemetry-statsite_address) |
     | `statsite_prefix` | [`telemetry.metrics_prefix`](https://www.consul.io/docs/agent/options.html#telemetry-metrics_prefix) |
     | `telemetry.statsite_prefix` | [`telemetry.metrics_prefix`](https://www.consul.io/docs/agent/options.html#telemetry-metrics_prefix) |
     | (service definitions) `serviceid` | [`service_id`](https://www.consul.io/docs/agent/services.html) |

website/content/docs/upgrading/instructions/upgrade-to-1-10-x.mdx

@@ -48,7 +48,7 @@ The licensing changes outlined on the [Specific Version Details](/docs/upgrading
 page are the main breaking changes in Consul Enterprise 1.10 that require special handling during the upgrade process.
 The page also describes other changes that might cause issues during an upgrade.
 You can also review the [licensing FAQ](/docs/enterprise/license/faq), which includes granular details, as well as the full
-[changelog](https://github.com/hashicorp/consul/blob/master/CHANGELOG.md#1100-june-22-2021).
+[changelog](https://github.com/hashicorp/consul/blob/main/CHANGELOG.md#1100-june-22-2021).
 We strongly recommend reviewing the changes prior to upgrading.
 
 ## Procedures