Update fastaguard to 0.7.0

[ehsanestaji]

Updates FASTAGUARD from 0.6.0 to 0.7.0 now that the Bioconda package and BioContainer are published.

The module command, four report outputs, arguments, and conventional exit behaviour are unchanged.

PR checklist

• This comment contains a description of the change and its reason.
• Existing tests cover PASS, WARN, policy FAIL, and invalid FASTA reports.
• The software version is broadcast to the versions topic.
• Naming, inputs, outputs, and the process label remain unchanged.
• The module uses the published Bioconda package and BioContainer.

Testing:

• nf-core modules lint fastaguard
• nf-test test modules/nf-core/fastaguard/tests --profile=+docker --stop-on-first-failure
• nf-test test modules/nf-core/fastaguard/tests --profile=+conda --stop-on-first-failure
• Singularity test will run in CI.