chore: regenerate README (googleapis#271)

This PR was generated using Autosynth. 🌈


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

```
2020-10-15 22:43:18,502 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-resourcemanager/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-15 22:43:19,459 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/128052fe-465f-41a7-88f9-a76876e9437e/targets

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java-resourcemanager/.github/readme/synth.metadata/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-resourcemanager.git",
-        "sha": "40f1cfd6cec1fc547ad257f64ecd2585094393ed"
+        "sha": "9aed52e7d61dca8f4ba12242d7fb0a3150df9991"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "b6164c26a111f7f587099d31253abb96b5737bb2"
+        "sha": "27e0e916cbfdb3d5ff6639b686cc04f78a0b0386"
       }
     }
   ]

java-resourcemanager/README.md

@@ -46,8 +46,6 @@ If you are using Maven without BOM, add this to your dependencies:
 
 ```
 
-[//]: # ({x-version-update-start:google-cloud-resourcemanager:released})
-
 If you are using Gradle, add this to your dependencies
 ```Groovy
 compile 'com.google.cloud:google-cloud-resourcemanager:0.118.2-alpha'
@@ -56,7 +54,6 @@ If you are using SBT, add this to your dependencies
 ```Scala
 libraryDependencies += "com.google.cloud" % "google-cloud-resourcemanager" % "0.118.2-alpha"
 ```
-[//]: # ({x-version-update-end})
 
 ## Authentication