Fix the encoding of series title in titlePage

[cmil]

The element <bibl> is not allowed in <titlePage>:

poldracor/tei/blizinski-marcowy-kawaler.xml

Lines 89 to 93 in 1a2bdfe

	<titlePage>
	<bibl>
	<series>BIBLIOTEKA TEATRÓW AMATORSKICH<lb/> Nr. 17.</series>
	</bibl>
	<docTitle>

We need to find another way to encode this information. See https://www.tei-c.org/release/doc/tei-p5-doc/en/html/ref-titlePage.html

[tombernas]

Maybe inside <docEdition> would be better, there <bibl> is allowed.

[cmil]

From the documentation it looks like <docEdition> is really meant to be used for edition information like "The Third edition Corrected". Maybe something like <titlePart type="series">...</titlePart> would be less ambiguous.