DEVO-174 master to main

- Updates references to master in README and circleci config files

.circleci/setup_solr.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 cd ..
-git clone --single-branch --branch master [email protected]:tulibraries/ansible-playbook-solrcloud.git
+git clone --single-branch --branch main [email protected]:tulibraries/ansible-playbook-solrcloud.git
 mkdir -p ansible-playbook-solrcloud/data/tmp/collections
 cp -r ~/project ansible-playbook-solrcloud/data/tmp/collections/tul_cob-az
 cd ansible-playbook-solrcloud

README.md

@@ -47,18 +47,18 @@ $ curl "http://localhost:8090/solr/admin/collections?action=CREATEALIAS&name=tul
 
 ## SolrCloud Deployment
 
-All PRs merged into the `master` branch are _not_ deployed anywhere. Only releases are deployed.
+All PRs merged into the `main` branch are _not_ deployed anywhere. Only releases are deployed.
 
 ### Production
 
-Once the master branch has been adequately tested and reviewed, a release is cut. Upon creating the release tag (generally just an integer), the following occurs:
+Once the main branch has been adequately tested and reviewed, a release is cut. Upon creating the release tag (generally just an integer), the following occurs:
 1. new ConfigSet of `tul_cob-az-{release-tag}` is created in [Production SolrCloud](https://solrcloud.tul-infra.page);
 2. new Collection of `tul_cob-az-{release-tag}-init` is created in [Production SolrCloud](https://solrcloud.tul-infra.page) w/the requisite ConfigSet (this Collection is largely ignored);
 3. a new QA alias of `tul_cob-az-{release-tag}-qa` is created in [Production SolrCloud](https://solrcloud.tul-infra.page), pointing to the init Collection;
 3. a new Stage alias of `tul_cob-az-{release-tag}-stage` is created in [Production SolrCloud](https://solrcloud.tul-infra.page), pointing to the init Collection;
 3. a new Production alias of `tul_cob-az-{release-tag}-prod` is created in [Production SolrCloud](https://solrcloud.tul-infra.page), pointing to the init Collection;
 4. and, manually, a full reindex DAG is kicked off from Airflow Production to this new tul_cob-az alias. Upon completion of the reindex, relevant clients are redeployed pointing at their new alias, and *then QA & UAT review occur*.
 
-See the process outlined here: https://github.com/tulibraries/grittyOps/blob/master/services/solrcloud.md
+See the process outlined here: https://github.com/tulibraries/docs/blob/main/services/solrcloud.md
 
 After some time (1-4 days, as needed), the older tul_cob-az collections are manually removed from Prod SolrCloud.