Language fix for supported languages repository

A language fix is needed in the supported languages repository as per the following Vale suggestions:

modules/end-user-guide/examples/snip_che-supported-languages.adoc

 1:29  error    Use 'tools' rather than   'tooling'.       RedHat.TermsErrors  
  4:1  warning  Use either 'or' or 'and' in   'C/C'     RedHat.Slash        
 4:20  warning  Use either 'or' or 'and' in  'C/C'   RedHat.Slash        
 8:98  error    Use 'demonstration' rather than 'demo'.      RedHat.TermsErrors  
 9:63  warning  Use correct American English spelling. Did you really mean  'Petclinic'?     RedHat.Spelling     
 9:73  error    Use 'demonstration' rather  than 'demo'.      RedHat.TermsErrors  
10:54  warning  Consider using 'Node.js' instead of 'NodeJS'       CheDocs.CommonTerms 
11:44  warning  Consider using 'Node.js' instead of 'NodeJS'      CheDocs.CommonTerms 
12:44  warning  Consider using 'Node.js' instead of 'NodeJS'      CheDocs.CommonTerms 
13:52  warning  Consider using 'Node.js' instead of 'NodeJS'      CheDocs.CommonTerms 
14:60  warning  Consider using 'Node.js' instead of 'NodeJS'      CheDocs.CommonTerms 
{{15:5   warning  Use correct American English spelling. Did you really mean 'Symfony'?      RedHat.Spelling     }}
15:30  warning  Use correct American English spelling. Did you really mean 'Symfony'?      RedHat.Spelling     
15:38  error    Use 'demonstration' rather than 'Demo'.    RedHat.TermsErrors  
20:41  warning  Use correct American English spelling. Did you really mean 'sbt'?         RedHat.Spelling