Update scrna_seq.md (theislab#203)

Correct MinIO -> MinION.

jupyter-book/introduction/scrna_seq.md

@@ -86,7 +86,7 @@ First, long-read sequencing, which describes the ability to obtain nucleotide fr
 
 Pacific Biosciences' (PacBio) introduced zero-mode waveguide (ZMW) sequencing in 2010, which uses so-called nanoholes containing a single DNA polymerase. This allows incorporation of any single nucleotide to be directly observed by detectors attached below the nanoholes. Each type of nucleotides is labeled with a specific fluorescent dye that emits fluorescent signals during the incorporation process, which are subsequently measured as sequence readout. Reads obtained from PacBio sequencers are usually of 8 to 15 kilobases (kb), with possibilities for up to 70kb.
 
-Oxford Nanopore Technologies' introduced the GridION in 2012. The GridION and its successors MinIO and Flongle are portable sequencers for DNA and RNA sequencing which produce reads of more than 2 Mb. Notably, such a sequencing device even fits into a single human hand. Oxford Nanopore sequencers observe changes in the electrical current that occur when nucleic acids pass through protein nanopores, to identify the nucleotide sequence{cite}`Jain2016`.
+Oxford Nanopore Technologies' introduced the GridION in 2012. The GridION and its successors MinION and Flongle are portable sequencers for DNA and RNA sequencing which produce reads of more than 2 Mb. Notably, such a sequencing device even fits into a single human hand. Oxford Nanopore sequencers observe changes in the electrical current that occur when nucleic acids pass through protein nanopores, to identify the nucleotide sequence{cite}`Jain2016`.
 
 Strengths: