Rename metro maps

Author: drpatelh

README.md

@@ -30,7 +30,7 @@ You can find numerous talks on the [nf-core events page](https://nf-co.re/events
 
 ## Pipeline summary
 
-![nf-core/RNASeq Workflow Diagram](docs/images/pipeline_diagram_grey.png)
+![nf-core/rnaseq metro map](docs/images/nf-core-rnaseq_metro_map_grey.png)
 
 The SRA download functionality has been removed from the pipeline (`>=3.2`) and ported to an independent workflow called [nf-core/fetchngs](https://nf-co.re/fetchngs). You can provide `--nf_core_pipeline rnaseq` when running nf-core/fetchngs to download and auto-create a samplesheet containing publicly available samples that can be accepted directly as input by this pipeline.
 
@@ -59,7 +59,6 @@ The SRA download functionality has been removed from the pipeline (`>=3.2`) and
 15. Present QC for raw read, alignment, gene biotype, sample similarity, and strand-specificity checks ([`MultiQC`](http://multiqc.info/), [`R`](https://www.r-project.org/))
 
 > - **NB:** Quantification isn't performed if using `--aligner hisat2` due to the lack of an appropriate option to calculate accurate expression estimates from HISAT2 derived genomic alignments. However, you can use this route if you have a preference for the alignment, QC and other types of downstream analysis compatible with the output of HISAT2.
-> - **NB:** The `--aligner star_rsem` option will require STAR indices built from version 2.7.6a or later. However, in order to support legacy usage of genomes hosted on AWS iGenomes the `--aligner star_salmon` option requires indices built with STAR 2.6.1d or earlier. Please refer to this [issue](https://github.com/nf-core/rnaseq/issues/498) for further details.
 
 ## Quick Start