update readme with correct karaf version
update readme with correct karaf version

bseeger/fcrepo-camel-toolbox,fcrepo4-exts/fcrepo-camel-toolbox,mohideen/fcrepo-camel-toolbox,mohideen/fcrepo-camel-toolbox,fcrepo4-exts/fcrepo-camel-toolbox,fcrepo4-labs/fcrepo-camel-toolbox,fcrepo4-labs/fcrepo-camel-toolbox,bseeger/fcrepo-camel-toolbox