Fix PHP8.2 deprecated warnings in getHtmlDomArray() in tcpdf.php #466

Job	Run time
Static Analysis	3m 51s
Test on php 7.1 and ubuntu-latest	1m 57s
Test on php 7.2 and ubuntu-latest	3m 32s
Test on php 7.3 and ubuntu-latest	2m 37s
Test on php 7.4 and ubuntu-latest	2m 5s
Test on php 8.0 and ubuntu-latest	2m 0s
Test on php 8.1 and ubuntu-latest	2m 57s
Test on php 8.2 and ubuntu-latest	2m 46s
Test on php 5.3 and ubuntu-latest	5m 15s
Test on php 5.4 and ubuntu-latest	4m 38s
Test on php 5.5 and ubuntu-latest	4m 7s
Test on php 5.6 and ubuntu-latest	5m 42s
Test on php 7.0 and ubuntu-latest	3m 47s
Test on php 8.2 and macos-latest	4m 8s
Test on php 8.2 and windows-latest	3m 38s
Test on php 8.3 and ubuntu-latest	2m 47s
Test on php nightly and ubuntu-latest	3m 34s
	59m 21s

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