Accessibility: Empty headings

[kevinkidwell]

Describe the bug
Empty headings cannot exist for accessibility. All heading tags must have content.

Page: SiteImprove Exhibits: Empty Headings

To Fix
Content Owners will need to be sure that headings exist for all images in slideshows and on all pages. Headings are currently missing on 5 different pages. This should be fixed by Content Owners.

Pages to fix:
https://my2.siteimprove.com/Inspector/1081272/A11Y/Page?pageId=68309665128&impmd=3CC33A985F387DC37EA87D3D5A2306C4&decision=dismissed+falsePositive+none#/sia-r64/failed/WWRtNld6a2o=;Mjc5YmVkNjY=
https://my2.siteimprove.com/Inspector/1081272/A11Y/Page?pageId=58322089057&impmd=3CC33A985F387DC37EA87D3D5A2306C4&decision=dismissed+falsePositive+none#/sia-r64/failed/dVl1Q2ZFUlA=;ZWFmODgzNTU=
https://my2.siteimprove.com/Inspector/1081272/A11Y/Page?pageId=68309665135&impmd=3CC33A985F387DC37EA87D3D5A2306C4&decision=dismissed+falsePositive+none#/sia-r64/failed/WWRtNld6a2o=;Mjc5YmVkNjY=
https://my2.siteimprove.com/Inspector/1081272/A11Y/Page?pageId=58325076337&impmd=3CC33A985F387DC37EA87D3D5A2306C4&decision=dismissed+falsePositive+none#/sia-r64/failed/R1I3djBWeWE=;ZTkyNzNkYmE=
https://my2.siteimprove.com/Inspector/1081272/A11Y/Page?pageId=68309665131&impmd=3CC33A985F387DC37EA87D3D5A2306C4&decision=dismissed+falsePositive+none#/sia-r64/failed/WWRtNld6a2o=;Mjc5YmVkNjY=