added a warning about undocumented changes to the changelog of the v1…

….5.7.0 release

CHANGELOGRELEASE.md

@@ -8,6 +8,11 @@ This patch release fixes three minor bugs, some of which were accidentally intro
 
 ### V 1.5.7.0
 
+> [!WARNING]
+> On 2024/11/06 we realized that this release includes a breaking change that is not documented below.
+> The command line input interface for unpackaged genotype data was modified from previously `--inFormat EIGENSTRAT|PLINK + --genoFile + --snpFile + --indFile` to now `--genoFile + --snpFile + --indFile` and `--bedFile + --bimFile + --famFile`. So the format selection with the `--inFormat` argument was removed and replaced with separate file selectors for EIGENSTRAT and PLINK data.
+> This affects all `trident` subcommands that allow reading of unpackaged genotype data, namely `init`, `forge`, `genoconvert` and `validate`.
+
 This release further improves `.janno` parsing error messages and adds reading support for gzipped PLINK (`.bed` and `.bim`) and EIGENSTRAT (`.geno` and `.snp`) files. We also added (experimental) support for reading VCF files.
 
 #### Better .janno error messages