Remove plural from Roles when defining inline permissions

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.10 DXP FP3, 7.1.1 CE GA2, 7.1.10.1 SP1, 7.1.X, Master
• Component/s: User Management > Users & Organizations
• Labels:
  • liferay-dxp-71-sp1
  • liferay-fixpack-dxp-3-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 1
• Sprint: U&SM | Sprint 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/64006

Description
The header text should be "role" not "roles".

Steps to Reproduce

1. Product Menu > Content > Documents and Media
2. Select Document Type Tab
3. Click Plus button
4. Click Permissions section
5. Click More options

Reproduced on
Tomcat 9.0.10 + MySQL 5.7.10.
Portal master GIT ID: b92ed78e79ad1c1128d3935b1df01961b476f106.