Figure <label> doesn't render unless there's also a <title>

[pgoussy]

Describe the bug A figure whose only caption is "Figure 1" (without additional text beyond this numerical label) was not displaying any caption text at all in Janeway.

To Reproduce Steps to reproduce the behavior:

1. Go to https://journals.publishing.umich.edu/ergo/plugins/typesetting/preview_galley/article/1125/galley/424/#F1
2. Link should go directly to Figure 1; if not, click on "Veridical versus Deceptive States and Their Associated Credences" and scroll down until you see an image.
3. Notice that there is no "Figure 1" label/caption box displaying under the image, even though it's tagged properly in the JATS.

<fig id="F1" position="anchor">
<label>Figure 1</label>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="ergo-1125-f0001.jpg"/>
</fig>

As an experiment, I tried a few alternative taggings:

<caption><label>Figure 1</label></caption>

Surrounding the <label> with <caption> tags didn't change anything.

<label>Figure 1</label>
<caption><title>test</title></caption>

Adding a <title> successfully caused the shaded caption box to appear, displaying both the <title> text and the <label> text

Expected behavior Figure label should display in a caption box, even if there isn't additional caption text present.

[pgoussy]

Bumping up because this seems tangentially related to #2911 which I just reported.