Replace category management description

[lucianogorza]

Related issue
#6357

Description

Replace category management description Indexer/Dashboard management with Indexer management

Evidence

Tests

• Build the package in any supported platform
  • [ ] Linux
  • [ ] Windows
  • [ ] macOS
  • [ ] Solaris
  • [ ] AIX
  • [ ] HP-UX
• [ ] Package installation
• [ ] Package upgrade
• [ ] Package downgrade
• [ ] Package remove
• [ ] Package install/remove/install
• [ ] Change added to CHANGELOG.md

• Tests for Linux RPM
  • [ ] Build the package for x86_64
  • [ ] Build the package for i386
  • [ ] Build the package for armhf
  • [ ] Build the package for aarch64
  • [ ] %files section is correctly updated if necessary
• Tests for Linux deb
  • [ ] Build the package for x86_64
  • [ ] Build the package for i386
  • [ ] Build the package for armhf
  • [ ] Build the package for aarch64
  • [ ] Package install/remove/install
  • [ ] Package install/purge/install
  • [ ] Check file permissions after installing the package
• Tests for macOS
  • [ ] Test the package from macOS Sierra to Mojave
• Tests for Solaris
  • [ ] Test the package on Solaris 10
  • [ ] Test the package on Solaris 11
  • [ ] Check file permissions on Solaris 11 template
• Tests for IBM AIX
  • [ ] %files section is correctly updated if necessary
  • [ ] Check the changes from IBM AIX 5 to 7