fix: make isoformanalyzer annotation match transcriptome reference (#152)

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-->

## Summary by CodeRabbit

- **Chores**
- Updated the annotation retrieval process in the workflow to use a new
parameter and wrapper version, which may affect how annotation data is
processed.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: dlaehnemann

workflow/rules/ref.smk

@@ -23,13 +23,13 @@ rule get_annotation:
         species=config["resources"]["ref"]["species"],
         release=config["resources"]["ref"]["release"],
         build=config["resources"]["ref"]["build"],
-        fmt="gtf",
+        flavor="chr_patch_hapl_scaff",  # optional, e.g. chr_patch_hapl_scaff, see Ensembl FTP.
     log:
         "logs/get-annotation.log",
     cache: "omit-software"
     localrule: True
     wrapper:
-        "0.80.1/bio/reference/ensembl-annotation"
+        "v6.0.1/bio/reference/ensembl-annotation"
 
 
 rule get_transcript_info: