Update query-free-text-search.markdown
Update query-free-text-search.markdown

added an example for a query searching for values with a single quote
yohanakh/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,kemiz/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll,yohanakh/gigaspaces-wiki-jekyll,barakb/gigaspaces-wiki-jekyll