chore: regenerate README (#690)

Author: yoshi-automation

.github/readme/synth.metadata/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-spanner.git",
-        "sha": "16c793953a4adca21f19ac70452a39ca88a196bd"
+        "sha": "7a51606e49dfa4816dcbfd23d133e66414f3e52c"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "943bb78606d035001123030067dffcc34f4645f2"
+        "sha": "5d11bd2888c38ce1fb6fa6bf25494a4219a73928"
       }
     }
   ]

README.md

@@ -38,18 +38,18 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner</artifactId>
-  <version>3.0.4</version>
+  <version>3.0.5</version>
 </dependency>
 
 ```
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-spanner:3.0.4'
+compile 'com.google.cloud:google-cloud-spanner:3.0.5'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "3.0.4"
+libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "3.0.5"
 ```
 
 ## Authentication