Several small changes to GHA. #15

Job	Run time
PHP Syntax Linting	6s
Validate dependencies file	5s
Scan Dependencies Vulnerabilities	13s
PHP Version Compatibility (8.3)	6s
PHP Version Compatibility (8.1)	6s
PHP Unit Tests (8.3)	18s
PHP Unit Tests (8.2)	12s
PHP Unit Tests (8.1)	19s
PHP Version Compatibility (8.2)	6s
PHP Unit Tests (8.0)	17s
PHP Version Compatibility (8.0)	6s
	1m 54s

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