🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

google-cloud-run-bom/pom.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0"?>
+<?xml version='1.0' encoding='UTF-8'?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.google.cloud</groupId>

google-cloud-run/pom.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0"?>
+<?xml version='1.0' encoding='UTF-8'?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.google.cloud</groupId>
@@ -112,4 +112,4 @@
  </plugin>
  </plugins>
  </build>
-</project>
+</project>