ci(dorado/basecaller): skip conda nf-test for modules/nf-core/dorado

dorado is not distributed on bioconda or conda-forge (ONTPL licence), so
`environment.yml` is a placeholder carrying only samtools. The conda
profile run would therefore execute `dorado basecaller` against an
environment that does not contain dorado.

Adds the `modules/nf-core/dorado` prefix to the `conda` skip list, the
same mechanism parabricks and cellranger use. Matches the entry already
present in nf-core#11222 (dorado/aligner) so each PR stands alone.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013fqrTt7TV2RSSUHaA4wP4v

Author: sahuno

.github/skip_nf_test.json

@@ -46,6 +46,7 @@
         "modules/nf-core/deepvariant/vcfstatsreport",
         "subworkflows/nf-core/dia_proteomics_analysis",
         "modules/nf-core/diann",
+        "modules/nf-core/dorado",
         "modules/nf-core/doubletdetection",
         "modules/nf-core/fastk/fastk",
         "modules/nf-core/fastk/histex",