README: update configuration instructions - use latest blast+ (2.2.25)
README: update configuration instructions - use latest blast+ (2.2.25)

deepakunni3/sequenceserver,yeban/sequenceserver,IsmailM/sequenceserver,lepbase/lepbase-sequenceserver,elsiklab/sequenceserver,deepakunni3/sequenceserver,lepbase/lepbase-sequenceserver,jasminZ/sequenceserver,yeban/sequenceserver,yeban/sequenceserver,jasminZ/sequenceserver,elsiklab/sequenceserver,deepakunni3/sequenceserver,lepbase/lepbase-sequenceserver,aldermossy/sequenceserver,aldermossy/sequenceserver,jasminZ/sequenceserver,vivekiitkgp/sequenceserver,IsmailM/sequenceserver,yeban/sequenceserver,vivekiitkgp/sequenceserver,aldermossy/sequenceserver,aldermossy/sequenceserver,IsmailM/sequenceserver,vivekiitkgp/sequenceserver,elsiklab/sequenceserver