chore: regenerate README (#261)

This PR was generated using Autosynth. 🌈


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

```
2020-11-17 09:14:13,173 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-datastore/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-17 09:14:14,112 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/64a78e82-232a-41f0-8637-ec3cdd463250/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-datastore.git",
-        "sha": "b984e360ccaf30f55b239f831430256f3231036f"
+        "sha": "1d807e6df139399f296c4e780864bf5f5e5acb6e"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "ea52b8a0bd560f72f376efcf45197fb7c8869120"
+        "sha": "d5fc0bcf9ea9789c5b0e3154a9e3b29e5cea6116"
       }
     }
   ]

README.md

@@ -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-datastore:1.105.0'
+compile 'com.google.cloud:google-cloud-datastore:1.105.1'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-datastore" % "1.105.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-datastore" % "1.105.1"
 ```
 
 ## Authentication