Release Notes

from：release/ver-2.6.0.6 to：release/ver-2.6.0.8

FIX BUGS: fix: fixed compilation errors produced by old gcc version (#14619) fix: masters number in log.dnodes_info (#14489) fix: tsdb read merge block and memory condition check is not right (#14395) fix: fix a typo(#14387) fix: resolve arithmetic issues of first/last/last_row with keepColumnName enabled (#14365) fix: filter condition filterRmUnitRange can not reset unitIdx (#14372) fix: percentile second scan not call cause crash (#14326) fix: add error code TSDB_CODE_TSC_TOO_MANY_SML_LINES (#14280) fix: fixed activation info error (#814)