Corrects link to methylation controls

Author: bwlang

README.md

@@ -74,7 +74,7 @@ Modify the conf/references.config file to specify your genome files
 Pre-built reference genomes with methylation spike-in controls:
 - **T2T CHM13**: https://neb-em-seq-sra.s3.amazonaws.com/T2T_chm13v2.0%2Bbs_controls.fa
 - **GRCh38**: https://neb-em-seq-sra.s3.amazonaws.com/grch38_core%2Bbs_controls.fa
-- Create your own reference by appending the [control sequences](methylation_controls.fa) to your preferred genome fasta (e.g. `cat genome.fa methylation_controls.fa > genome+methylation_controls.fa`)
+- Create your own reference by appending the [control sequences](assets/methylation_controls.fa) to your preferred genome fasta (e.g. `cat genome.fa methylation_controls.fa > genome+methylation_controls.fa`)
    | Sequence | Methylation State                                | Purpose |
    |----------|--------------------------------------------------|---------|
    | lambda   | All Cs are unmodified (included in kits)         | confirmation that APOBEC enzyme is working optimially (unprotected C->T)  |