Bump phpcompatibility/phpcompatibility-wp from 2.1.5 to 2.1.6 #1775

Job	Run time
Pre run	4s
Lint: CSS	0s
Lint: JS	1m 5s
Lint: PHP	45s
Static Analysis: PHP	1m 13s
E2E test: JS (1, 2)	5m 35s
E2E test: JS (2, 2)	4m 52s
Feature tests: PHP 7.4, WP latest	2m 59s
Unit test: JS	1m 7s
Feature tests: PHP 8.4, WP trunk	3m 14s
Feature tests: PHP 8.3, WP trunk	3m 8s
Feature tests: PHP 8.2, WP trunk	3m 4s
Unit test: PHP 8.0, WP latest	3m 10s
Feature tests: PHP 8.1, WP trunk	3m 4s
Unit test: PHP 8.4, WP trunk	3m 16s
Feature tests: PHP 8.0, WP latest	3m 2s
Unit test: PHP 8.3, WP trunk	3m 23s
Feature tests: PHP 7.4, WP 6.6	3m 25s
Unit test: PHP 8.2, WP trunk	3m 16s
Unit test: PHP 8.1, WP trunk	2m 42s
Unit test: PHP 8.0, WP trunk Multisite	3m 10s
Unit test (with coverage): PHP 8.0, WP latest	4m 39s
Unit test: PHP 8.0, WP latest , Testsuite: external-http	3m 16s
Unit test: PHP 7.4, WP latest Multisite	2m 52s
Unit test: PHP 7.4, WP latest , Testsuite: external-http	2m 41s
Unit test: PHP 7.4, WP 6.6	3m 13s
Unit test: PHP 7.4, WP 6.6 , Testsuite: external-http	2m 50s
	1h 15m 5s

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