docs: fix length name

Author: atrigila

docs/output.md

@@ -728,7 +728,7 @@ The principal output files are the same between Salmon and Kallisto:
 - `<pseudo_aligner>/`
   - `<pseudo_aligner>.merged.gene_counts.tsv`: Matrix of gene-level raw counts across all samples.
   - `<pseudo_aligner>.gene_tpm.tsv`: Matrix of gene-level TPM values across all samples.
-  - `all_samples_gene.SummarizedExperiment.rds`: RDS object that can be loaded in R that contains a [SummarizedExperiment](https://bioconductor.org/packages/release/bioc/html/SummarizedExperiment.html) container with the abundance TPM (`tpm`), estimated counts (`counts`) and transcript length (`length`), estimated library size-scaled counts (`counts_scaled`), estimated length-scaled counts (`counts_length_scaled`) in the assays slot for genes.
+  - `all_samples_gene.SummarizedExperiment.rds`: RDS object that can be loaded in R that contains a [SummarizedExperiment](https://bioconductor.org/packages/release/bioc/html/SummarizedExperiment.html) container with the abundance TPM (`tpm`), estimated counts (`counts`) and gene length (`length`), estimated library size-scaled counts (`counts_scaled`), estimated length-scaled counts (`counts_length_scaled`) in the assays slot for genes.
   - `<pseudo_aligner>.merged.gene_lengths.tsv`: Matrix of average within-sample transcript lengths for each gene across all samples.
   - `<pseudo_aligner>.merged.gene_counts_scaled.tsv`: Matrix of gene-level library size-scaled estimated counts across all samples.
   - `<pseudo_aligner>.merged.gene_counts_length_scaled.tsv`: Matrix of gene-level length-scaled estimated counts across all samples.