Doc - Updates Array.md (#5367)
Doc - Updates Array.md (#5367)

Replace previously missed "Example" headlines with bold text.
graetzer/arangodb,graetzer/arangodb,fceller/arangodb,arangodb/arangodb,arangodb/arangodb,graetzer/arangodb,fceller/arangodb,fceller/arangodb,fceller/arangodb,Simran-B/arangodb,graetzer/arangodb,graetzer/arangodb,wiltonlazary/arangodb,graetzer/arangodb,Simran-B/arangodb,Simran-B/arangodb,wiltonlazary/arangodb,arangodb/arangodb,Simran-B/arangodb,arangodb/arangodb,arangodb/arangodb,arangodb/arangodb,fceller/arangodb,wiltonlazary/arangodb,fceller/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,graetzer/arangodb,wiltonlazary/arangodb,graetzer/arangodb,fceller/arangodb,graetzer/arangodb,Simran-B/arangodb,graetzer/arangodb,graetzer/arangodb,Simran-B/arangodb,arangodb/arangodb,fceller/arangodb,fceller/arangodb,Simran-B/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,graetzer/arangodb,Simran-B/arangodb,Simran-B/arangodb,arangodb/arangodb,fceller/arangodb,Simran-B/arangodb,graetzer/arangodb,graetzer/arangodb