Update elsevier-harvard-without-titles.csl

[POBrien333]

Just came across this discrepancy between elsevier-harvard-without-titles.csl and elsevier-harvard.csl and think it's an error.
Funny enough, this style was not updated in exactly 12 years. To the day.

[github-actions]

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[github-actions]

😃 Your submission passed all our automated tests.

Below are some sample citations generated based on your proposed changes:

elsevier-harvard-without-titles.csl (modified style; unchanged output for sample items)

(“CSL search by example,” 2012; Hancké et al., 2007)
(Fenner et al., 2019; Mares, 2001)

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CSL search by example [WWW Document], 2012. [WWW Document]. Citation Style Editor. URL http://editor.citationstyles.org/searchByExample/ (accessed 12.15.12).
Fenner, M., Crosas, M., Grethe, J.S., Kennedy, D., Hermjakob, H., Rocca-Serra, P., Durand, G., Berjon, R., Karcher, S., Martone, M., Clark, T., 2019. Sci. Data 6, 28.
Hancké, B., Rhodes, M., Thatcher, M. (Eds.), 2007. Beyond varieties of capitalism: Conflict, contradiction, and complementarities in the European economy. Oxford University Press, Oxford and New York.
Mares, I., 2001. Firms and the welfare state: When, why, and how does social policy matter to employers?, in: Hall, P.A., Soskice, D. (Eds.), Varieties of Capitalism. The Institutional Foundations of Comparative Advantage. Oxford University Press, New York, pp. 184–213.