Temporarily ignore protoc-gen-validate v1.3.0 (java) release (#2137)

Author: pkwarren

plugins/bufbuild/validate-java/source.yaml

@@ -1,4 +1,6 @@
 source:
+  ignore_versions:
+    - v1.3.0 # Temporarily ignore version until a release is published.
   github:
     owner: bufbuild
     repository: protoc-gen-validate