deps: update dependency org.apache.commons:commons-lang3 to v3.15.0 (#3060)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[org.apache.commons:commons-lang3](https://commons.apache.org/proper/commons-lang/)
([source](https://gitbox.apache.org/repos/asf?p=commons-lang.git)) |
`3.14.0` -> `3.15.0` |
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|
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|
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|
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Author: renovate-bot

gax-java/dependencies.properties

@@ -60,7 +60,7 @@ maven.org_apache_tomcat_annotations_api=org.apache.tomcat:annotations-api:6.0.53
 maven.com_google_code_gson_gson=com.google.code.gson:gson:2.11.0
 maven.com_google_guava_guava=com.google.guava:guava:32.1.3-jre
 maven.com_google_guava_failureaccess=com.google.guava:failureaccess:1.0.2
-maven.org_apache_commons_commons_lang3=org.apache.commons:commons-lang3:3.14.0
+maven.org_apache_commons_commons_lang3=org.apache.commons:commons-lang3:3.15.0
 maven.com_google_android_annotations=com.google.android:annotations:4.1.1.4
 maven.com_google_code_findbugs_jsr305=com.google.code.findbugs:jsr305:3.0.2
 maven.com_google_errorprone_error_prone_annotations=com.google.errorprone:error_prone_annotations:2.28.0