Fix grammar

Signed-off-by: ingonoka <ingonoka@icloud.com>

README.adoc

@@ -10,7 +10,7 @@ The validator is expected to support the SSP(TM) protocol.
 Include the latest library version in your `gradle.build` dependency block
 
 [source,Groovy]
-.Replace `latest`[placeholder with the latest release version]
+.Replace the `latest` placeholder with the latest release version
 ----
 implementation "com.ingonoka:cba9-driver:latest"
 ----