Note about just cog in release process

See 8002325

Release 0.27.1

Refs #1237, #1238, #1239. #1240

Credit James Sanford in changelog, refs #1218, #1232

Release 0.26

Refs #1000, #1089, #1094, #1096, #1097, #1099, #1103, #1066

Release 0.26a1

Refs #985, #1004, #1013, #1020, #1025, #1031, #1032, #1037, #1042, #1043, #1044, #1045, #1047, #1048, #1052, #1059, #1060, #1061, #1062, #1063, #1068, #1069, #1070, #1072, #1073, #1074, #1077, #1079, #1081, #1082, #1083, #1086, #1087

Release 0.26a0

Refs #937, #988, #991, #992, #994, #995, #997, #998, #999, #1002, #1003, #1005, #1007, #1008, #1010, #1012, #1016, #1017, #1019, #1021, #1022, #1023, #1024

Better link

Release 0.25a0

Refs #887, #903, #904, #908

Release 0.24.2

Refs #901, #902

Release 0.24.1

Refs #879, #897