Env setup: Fix headings

Author: ewels

docs/envsetup/01_setup.md

@@ -68,6 +68,6 @@ GitHub Codespaces will time out after 30 minutes of inactivity and will save you
 More information can be found in the GitHub docs:
 [About billing for GitHub Codespaces](https://docs.github.com/en/billing/managing-billing-for-your-products/managing-billing-for-github-codespaces/about-billing-for-github-codespaces)
 
-### Saving files from GitHub Codespaces to your local machine
+## Saving files from GitHub Codespaces to your local machine
 
 To save any file from the explorer panel, right-click the file and select `Download`.

mkdocs.yml

@@ -179,15 +179,14 @@ plugins:
       exclude:
         - index.md
         - help.md
-        - envsetup/index.md
         - basic_training/index.md
         - advanced/index.md
-        - hello_nextflow/index.md
         - nf_customize/index.md
         - nf_develop/index.md
         - troubleshoot/index.md
         - hands_on/index.md
         - hands_on/solutions/*md
+        - envsetup/*.md
         - hello_nextflow/*.md
   - i18n:
       docs_structure: suffix