timestamp comparison in client expiration logic

[rnbguy]

The following inequality should be >=

ibc-rs/ibc-clients/ics07-tendermint/src/client_state/validation.rs

Lines 224 to 225 in 2378cd4

	if elapsed_since_latest_consensus_state > client_state.trusting_period {
	return Ok(Status::Expired);

Considering the is_within_trust_period logic from tendermint-rs.

To summarize, tendermint-rs expires a header at trusted_header_time + trusting_period. However, in ibc-rs, a header is active till trusted_header_time + trusting_period.