chore: regenerate README (#154)

This PR was generated using Autosynth. 🌈


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

```
2021-02-26 01:21:28,637 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-functions/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-26 01:21:30,210 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/41c52911-2b3b-43eb-bed6-2eb8e531ecaf/targets

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

Author: yoshi-automation

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-functions.git",
-        "sha": "5df28dfb03594c626367e924da645e6156092754"
+        "sha": "81591aafa9b88f5baf26df8c0cd65c26cdc70d68"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "79ab0b44a2cc7d803d07c107f9faf07729fc4012"
+        "sha": "8c5628b86cfa8386de7b8fc1675e6b528b552d57"
       }
     }
   ]

README.md

@@ -17,19 +17,19 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-functions</artifactId>
-  <version>1.0.7</version>
+  <version>1.0.8</version>
 </dependency>
 
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-functions:1.0.7'
+compile 'com.google.cloud:google-cloud-functions:1.0.8'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-functions" % "1.0.7"
+libraryDependencies += "com.google.cloud" % "google-cloud-functions" % "1.0.8"
 ```
 
 ## Authentication