Fix singularity typo in bluebear.config

[dariolez]

The file bluebear.config sets the option autoMount for singularity. It seems that the actual option is autoMounts (with an 's') according to Nextflow's documentation: https://docs.seqera.io/nextflow/reference/config#singularityautomounts

---

name: Fix Config
about: Fix a typo in bluebear.config

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