Release v2.1.0-rc.1 (#2921)

## Proposed Changes

New release candidate to address Windows build failure for rc.0

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/v2.1.0-rc.0-",
+    prefix = "Lighthouse/v2.1.0-rc.1-",
     fallback = "unknown"
 );