docs: Switch links to https
docs: Switch links to https

Change-Id: I8062e2a6366848ade9981e486effb399b7d78855

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed