fix copy paste typo

assets/multiqc/deseq2_pca_header.txt

@@ -2,7 +2,7 @@
 #section_name: 'DESeq2 PCA plot'
 #description: "PCA plot between samples in the experiment.
 #              These values are calculated using <a href='https://bioconductor.org/packages/release/bioc/html/DESeq2.html'>DESeq2</a>
-#              in the <a href='https://github.com/nf-core/atacseq/blob/master/bin/deseq2_qc.r'><code>deseq2_qc.r</code></a> script."
+#              in the <a href='https://github.com/nf-core/rnaseq/blob/master/bin/deseq2_qc.r'><code>deseq2_qc.r</code></a> script."
 #plot_type: 'scatter'
 #anchor: 'deseq2_pca'
 #pconfig: