Update snapshot location (#1951)

Author: trask

CONTRIBUTING.md

@@ -40,8 +40,8 @@ In order to build and test this whole repository you need JDK 11+.
 
 For developers testing code changes before a release is complete, there are
 snapshot builds of the `main` branch. They are available from
-the Sonatype OSS snapshots repository at `https://oss.sonatype.org/content/repositories/snapshots/`
-([browse](https://oss.sonatype.org/content/repositories/snapshots/io/opentelemetry/contrib/))
+the Sonatype snapshot repository at `https://central.sonatype.com/repository/maven-snapshots/`
+([browse](https://central.sonatype.com/service/rest/repository/browse/maven-snapshots/io/opentelemetry/contrib/)).
 
 #### Building from source
 

RELEASING.md

@@ -7,8 +7,8 @@ The version is specified in [version.gradle.kts](version.gradle.kts).
 ## Snapshot builds
 
 Every successful CI build of the main branch automatically executes `./gradlew publishToSonatype`
-as the last step, which publishes a snapshot build to
-[Sonatype OSS snapshots repository](https://oss.sonatype.org/content/repositories/snapshots/io/opentelemetry/contrib/).
+as the last step, which publishes a snapshot build to the
+[Sonatype snapshot repository](https://central.sonatype.com/service/rest/repository/browse/maven-snapshots/io/opentelemetry/contrib/).
 
 ## Release cadence