Fix references to main branch after rename (#160)

Signed-off-by: slonka <slonka@users.noreply.github.com>

Author: slonka

.circleci/config.yml

@@ -33,10 +33,10 @@ jobs:
 
       - add_ssh_keys
 
-      # Deploy if on master branch. If the $RELEASE and $NEXT variables are set then prepare a full maven release.
+      # Deploy if on main branch. If the $RELEASE and $NEXT variables are set then prepare a full maven release.
       - deploy:
           command: |
-            if [ "${CIRCLE_BRANCH}" == "master" ]; then
+            if [ "${CIRCLE_BRANCH}" == "main" ]; then
               echo $GPG_KEY | base64 --decode > signing-key
               gpg --passphrase $GPG_PASSPHRASE --import signing-key
               shred signing-key

OWNERS.md

@@ -1,4 +1,4 @@
-* See the main [Envoy OWNERS.md](https://github.com/envoyproxy/envoy/blob/master/OWNERS.md) for general Envoy project
+* See the main [Envoy OWNERS.md](https://github.com/envoyproxy/envoy/blob/main/OWNERS.md) for general Envoy project
   ownership.
 * See [CONTRIBUTING.md](CONTRIBUTING.md) for general contribution guidelines.
 

README.md

@@ -1,6 +1,6 @@
 # java-control-plane
 
-[![CircleCI](https://circleci.com/gh/envoyproxy/java-control-plane.svg?style=svg)](https://circleci.com/gh/envoyproxy/java-control-plane) [![codecov](https://codecov.io/gh/envoyproxy/java-control-plane/branch/master/graph/badge.svg)](https://codecov.io/gh/envoyproxy/java-control-plane) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.envoyproxy.controlplane/java-control-plane/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.envoyproxy.controlplane/java-control-plane)
+[![CircleCI](https://circleci.com/gh/envoyproxy/java-control-plane.svg?style=svg)](https://circleci.com/gh/envoyproxy/java-control-plane) [![codecov](https://codecov.io/gh/envoyproxy/java-control-plane/branch/main/graph/badge.svg)](https://codecov.io/gh/envoyproxy/java-control-plane) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.envoyproxy.controlplane/java-control-plane/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.envoyproxy.controlplane/java-control-plane)
 
 This repository contains a Java-based implementation of an API server that implements the discovery service APIs defined
 in [data-plane-api](https://github.com/envoyproxy/data-plane-api). It started life as a port of