chore: regenerate README (#144)

This PR was generated using Autosynth. 🌈


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

```
2021-04-12 14:30:44,190 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-video-transcoder/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-04-12 14:30:45,584 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/5ca03934-d14d-4058-9096-aefb2a5a4ad0/targets

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.github/readme/synth.metadata/synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-video-transcoder.git",
-        "sha": "46de5c6703ae46a3a6361144df24029d7151ceb5"
+        "sha": "7ece9cc87c30169c1c5952271a8c18cd3cfd0bd1"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1f5e6bc8dc8e3661ee550905fc070e55e1b6cea1"
+        "sha": "0a071b3460344886297a304253bf924aa68ddb7e"
       }
     }
   ]

README.md

@@ -8,12 +8,9 @@ Java idiomatic client for [Video Transcoder][product-docs].
 - [Product Documentation][product-docs]
 - [Client Library Documentation][javadocs]
 
-
 > Note: This client is a work-in-progress, and may occasionally
 > make backwards-incompatible changes.
 
-
-
 ## Quickstart