chore: regenerate README (#265)

This PR was generated using Autosynth. 🌈


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

```
2020-11-08 23:10:41,211 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-spanner-jdbc/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-08 23:10:42,077 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/c618af2e-7ed8-4b37-892b-2ac9dc809ab4/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-spanner-jdbc.git",
-        "sha": "03f85578270816cdbcafa480bbf69e2fa9775dc5"
+        "sha": "3a305ba00b9739ceb17c879f82319b0a6b2a3f9f"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "6abb59097be84599a1d6091fe534a49e5c5cf948"
+        "sha": "1f1148d3c7a7a52f0c98077f976bd9b3c948ee2b"
       }
     }
   ]

README.md

@@ -58,30 +58,8 @@ See the [Google Cloud Spanner JDBC client library docs][javadocs] to learn how t
 use this Google Cloud Spanner JDBC Client Library.
 
 
-### Creating a JDBC Connection
-
-The following example shows how to create a JDBC connection to Cloud Spanner and execute a simple query.
-
-```java
-String projectId = "my-project";
-String instanceId = "my-instance";
-String databaseId = "my-database";
-
-try (Connection connection =
-    DriverManager.getConnection(
-        String.format(
-            "jdbc:cloudspanner:/projects/%s/instances/%s/databases/%s",
-            projectId, instanceId, databaseId))) {
-  try (Statement statement = connection.createStatement()) {
-    try (ResultSet rs = statement.executeQuery("SELECT CURRENT_TIMESTAMP()")) {
-      while (rs.next()) {
-        System.out.printf(
-            "Connected to Cloud Spanner at [%s]%n", rs.getTimestamp(1).toString());
-      }
-    }
-  }
-}
-```
+
+
 
 
 ## Troubleshooting
@@ -123,7 +101,7 @@ Java 8 OSX | [![Kokoro CI][kokoro-badge-image-3]][kokoro-badge-link-3]
 Java 8 Windows | [![Kokoro CI][kokoro-badge-image-4]][kokoro-badge-link-4]
 Java 11 | [![Kokoro CI][kokoro-badge-image-5]][kokoro-badge-link-5]
 
-[product-docs]: https://cloud.google.com/spanner/docs/use-oss-jdbc
+[product-docs]: https://cloud.google.com/pubsub/docs/
 [javadocs]: https://googleapis.dev/java/google-cloud-spanner-jdbc/latest/index.html
 [kokoro-badge-image-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-spanner-jdbc/java7.svg
 [kokoro-badge-link-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-spanner-jdbc/java7.html