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typos

Co-authored-by: Laurenz Rettig <[email protected]>

docs/how-tos/validate-nexus-file.md

@@ -120,9 +120,9 @@ Options:
   --help  Show this message and exit.
 ```
 
-*Development verion installation*
+*Development version installation*
 
-If this installation procedure above does not work, you can use the devlopment installation by using git:
+If this installation procedure above does not work, you can use the development installation by using git:
 ```
 python -m venv .py39
 source .py39/bin/activate