bump nexus-staging-maven plugin to 1.7.0 (#507)

Summary:
1.6.13 does not work with jdk 17 which is needed on CI now for the idea build.

I hope this works because I can not really test it locally.

Pull Request resolved: #507

Reviewed By: cgrushko

Differential Revision: D61711839

Pulled By: hick209

fbshipit-source-id: 90c2f3fd3c5c7feb0178e9aff9886dd5a0d1b872

pom.xml

@@ -48,7 +48,7 @@
  <plugin>
  <groupId>org.sonatype.plugins</groupId>
  <artifactId>nexus-staging-maven-plugin</artifactId>
- <version>1.6.13</version>
+ <version>1.7.0</version>
  <extensions>true</extensions>
  <configuration>
  <serverId>ossrh</serverId>