Freshness for API Council index and guidelines index

Mostly rephrasing things to make them more concise or consistent.

PiperOrigin-RevId: 740878637
Change-Id: I4cd4a327413efa3e03dc169bac3124630005e606
1 file changed
tree: b130f1d84a6b4253c24bf386c03bc8d6b3c66dc2
  1. api-guidelines/