chore: regenerate README (#333)

This PR was generated using Autosynth. 🌈


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

```
2020-11-12 18:20:27,210 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-logging/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-12 18:20:28,070 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/ca302549-be26-4903-afec-215cf7f18dcf/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-logging.git",
-        "sha": "899e2885de1f34c74189695e3e94ed81509229b7"
+        "sha": "a7226cb27df4831fce35210f17f1f5a109d6e665"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "7db8a6c5ffb12a6e4c2f799c18f00f7f3d60e279"
+        "sha": "7d652819519dfa24da9e14548232e4aaba71a11c"
       }
     }
   ]

README.md

@@ -17,7 +17,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>15.0.0</version>
+      <version>15.1.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -46,11 +46,11 @@ If you are using Maven without BOM, add this to your dependencies:
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-logging:1.102.0'
+compile 'com.google.cloud:google-cloud-logging:2.0.1'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-logging" % "1.102.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-logging" % "2.0.1"
 ```
 
 ## Authentication