Docs: update links to point to HEAD

... in anticipation of the branch rename for `master` to `3.x`.

Author: jrfnl

.github/CONTRIBUTING.md

@@ -87,7 +87,7 @@ jobs:
 
             Happy new year!
 
-            This PR is auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request) using the [`happy-new-year.yml` workflow](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/.github/workflows/happy-new-year.yml).
+            This PR is auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request) using the [`happy-new-year.yml` workflow](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/.github/workflows/happy-new-year.yml).
           # yamllint enable rule:line-length
           labels: |
             Type: chores/QA

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,7 +11,7 @@
  *
  * @author    Greg Sherwood <[email protected]>
  * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
- * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
  */
 
 namespace PHP_CodeSniffer;

.github/ISSUE_TEMPLATE/feature_request.md

@@ -5,7 +5,7 @@
  *
  * @author    Greg Sherwood <[email protected]>
  * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
- * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
  */
 
 require_once __DIR__.'/../autoload.php';

.github/pull_request_template.md

@@ -3,7 +3,7 @@ REM PHP Code Beautifier and Fixer fixes violations of a defined coding standard.
 REM 
 REM @author    Greg Sherwood <[email protected]>
 REM @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
-REM @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+REM @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
 
 set PHPBIN=php
 

.github/workflows/happy-new-year.yml

@@ -5,7 +5,7 @@
  *
  * @author    Greg Sherwood <[email protected]>
  * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
- * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
  */
 
 require_once __DIR__.'/../autoload.php';