docs: Fix typo in overview/source-directory.md
docs: Fix typo in overview/source-directory.md
gohugoio/hugo,tubo028/hugo,anthonyfok/hugo,fedelibre/hugo,mdhender/hugo,MarkDBlackwell/hugo,anthonyfok/hugo,fedelibre/hugo,gohugoio/hugo,MarkDBlackwell/hugo,fedelibre/hugo,anthonyfok/hugo,mdhender/hugo,mdhender/hugo,digitalcraftsman/hugo,fedelibre/hugo,mitchchn/hugo,mitchchn/hugo,tubo028/hugo,digitalcraftsman/hugo,mdhender/hugo,gohugoio/hugo