Change links from google.github.io/guava to guava.dev, including maki…

…ng sure they're https.

The links work even now because they automatically redirect.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=315392532

pom.xml

@@ -275,7 +275,7 @@
  <detectJavaApiLink>false</detectJavaApiLink>
  <links>
  <!-- TODO(cpovirk): Link to the version that we depend on? -->
- <link>https://google.github.io/guava/releases/snapshot-jre/api/docs</link>
+ <link>https://guava.dev/releases/snapshot-jre/api/docs</link>
  <link>https://developers.google.com/protocol-buffers/docs/reference/java</link>
  <link>https://junit.org/junit4/javadoc/latest/</link>
  <link>https://docs.oracle.com/javase/7/docs/api/</link>