Spelling fixes

Fix spelling of: above, already, anonymous, associated,
authentication, bandwidth, because, between, blocks, calculate,
candidates, cautious, changelog, cleaner, clipboard, command,
completely, concurrently, considered, constructs, corrupt, current,
daemon, dependencies, deprecated, directory, dispatcher, download,
eligible, ellipsis, encrypter, endpoint, entrieslist, essentially,
existing writers, existing, expires, filesystem, flushing, frequently,
hierarchy, however, implementation, implements, inaccurate,
individually, insensitive, longer, maximum, metadata, modified,
multipart, namedirfirst, nextcloud, obscured, opened, optional,
owncloud, pacific, passphrase, password, permanently, persimmon,
positive, potato, protocol, quota, receiving, recommends, referring,
requires, revisited, satisfied, satisfies, satisfy, semver,
serialized, session, storage, strategies, stringlist, successful,
supported, surprise, temporarily, temporary, transactions, unneeded,
update, uploads, wrapped

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

backend/sftp/sftp.go

@@ -952,7 +952,7 @@ func (f *Fs) run(cmd string) ([]byte, error) {
 
 	session, err := c.sshClient.NewSession()
 	if err != nil {
-		return nil, errors.Wrap(err, "run: get SFTP sessiion")
+		return nil, errors.Wrap(err, "run: get SFTP session")
 	}
 	defer func() {
 		_ = session.Close()