Release v2.1.0-rc.0 (#2905)

## Issue Addressed

NA

## Proposed Changes

Bump version tags to `v2.1.0-rc.0`.

## Additional Info

NA

common/lighthouse_version/src/lib.rs

@@ -16,7 +16,7 @@ pub const VERSION: &str = git_version!(
         // NOTE: using --match instead of --exclude for compatibility with old Git
         "--match=thiswillnevermatchlol"
     ],
-    prefix = "Lighthouse/v2.0.1-",
+    prefix = "Lighthouse/v2.1.0-rc.0-",
     fallback = "unknown"
 );