chore: regenerate README (#303)

This PR was generated using Autosynth. 🌈


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

```
2020-11-18 19:06:48,482 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-iot/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-18 19:06:49,406 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/0aabf941-4fe0-4817-b297-13e1abb66e74/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-iot.git",
-        "sha": "dbc9a3a6946e3d437b2b9caa32d872fd5b8c1f8f"
+        "sha": "fac2c75d65d9c25080321c59b8c9169b84cec496"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "2c8aecedd55b0480fb4e123b6e07fa5b12953862"
+        "sha": "7fcc405a579d5d53a726ff3da1b7c8c08f0f2d58"
       }
     }
   ]

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>16.0.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -45,11 +45,11 @@ 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-iot:1.1.6'
+compile 'com.google.cloud:google-cloud-iot:1.1.7'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-iot" % "1.1.6"
+libraryDependencies += "com.google.cloud" % "google-cloud-iot" % "1.1.7"
 ```
 
 ## Authentication