build(deps): bump io.grpc:grpc-netty-shaded

Bumps [io.grpc:grpc-netty-shaded](https://github.com/grpc/grpc-java) from 1.63.0 to 1.75.0.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.63.0...v1.75.0)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-netty-shaded
  dependency-version: 1.75.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

openfeature-provider/java/pom.xml

@@ -60,7 +60,7 @@
     <maven.compiler.source>17</maven.compiler.source>
     <maven.compiler.target>17</maven.compiler.target>
     <protobuf.version>3.25.5</protobuf.version>
-    <grpc.version>1.63.0</grpc.version>
+    <grpc.version>1.75.0</grpc.version>
     <slf4j.version>2.0.13</slf4j.version>
     <guava.version>33.2.1-jre</guava.version>
     <assertj.version>3.25.3</assertj.version>