DOCS: Update docs/red-system-specs.txt
DOCS: Update docs/red-system-specs.txt

Typing errors corrected. Lesser becomes Less. Added "%" op to BNF.
Updated example to be actual next year. Added "or Contexts" to chapter
Namespaces.

iArnold/red,iArnold/red,rheber/red,vehar/red,red-eco/red,rheber/red,red-eco/red,NikolayShubenkovProgSchool/red,vehar/red,NikolayShubenkovProgSchool/red