chore: regenerate README (googleapis#546)

This PR was generated using Autosynth. 🌈


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

```
2021-07-12 16:40:24,690 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-resourcemanager/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-07-12 16:40:25,961 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

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https://source.cloud.google.com/results/invocations/c6408416-67eb-4fb0-8ecd-6670a834dfe6/targets

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Author: yoshi-automation

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-resourcemanager.git",
-        "sha": "265945b320dcf1284696a58d6c27e0a1f12d5069"
+        "sha": "619022909b0ee49d03d605841c4e479376de0b89"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "09c59c20a4bf0daed1665af59035ff240fe356df"
+        "sha": "1620b2cbb253f05f9e97be5efc371d2ba3844179"
       }
     }
   ]

java-resourcemanager/README.md

@@ -175,7 +175,7 @@ import java.util.Iterator;
 Then add the following code to print a list of projects you can view:
 
 ```java
-Iterator<Project> projectIterator = resourceManager.list().iterateAll();
+Iterator<Project> projectIterator = resourceManager.list().iterateAll().iterator();
 System.out.println("Projects I can view:");
 while (projectIterator.hasNext()) {
   System.out.println(projectIterator.next().getProjectId());
@@ -234,6 +234,7 @@ pattern.  Complete source code can be found at
 
 
 
+
 ## Troubleshooting
 
 To get help, follow the instructions in the [shared Troubleshooting document][troubleshooting].