chore: regenerate README (#257)

This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
2021-02-25 22:45:16,935 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-grafeas/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-25 22:45:18,487 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

Full log will be available here:
https://source.cloud.google.com/results/invocations/18ebbf59-084c-4f80-bb09-e651f415fc85/targets

- [ ] To automatically regenerate this PR, check this box.

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-grafeas.git",
-        "sha": "06d4f003e0195882ed80bd9ac0f2432e104a75b1"
+        "sha": "8a654ecf0426a0ede20a6e8dc902ed2a2165e626"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "4679e7e415221f03ff2a71e3ffad75b9ec41d87e"
+        "sha": "8c5628b86cfa8386de7b8fc1675e6b528b552d57"
       }
     }
   ]

README.md

@@ -17,18 +17,18 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>io.grafeas</groupId>
   <artifactId>grafeas</artifactId>
-  <version>1.0.8</version>
+  <version>1.0.9</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'io.grafeas:grafeas:1.0.8'
+compile 'io.grafeas:grafeas:1.0.9'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "io.grafeas" % "grafeas" % "1.0.8"
+libraryDependencies += "io.grafeas" % "grafeas" % "1.0.9"
 ```
 
 ## Authentication