Bump the maven-dependencies group with 3 updates (#929)

Bumps the maven-dependencies group with 3 updates: [io.grpc:grpc-bom](https://github.com/grpc/grpc-java), [org.junit:junit-bom](https://github.com/junit-team/junit-framework) and [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin).

Updates `io.grpc:grpc-bom` from 1.73.0 to 1.74.0
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.73.0...v1.74.0)

Updates `org.junit:junit-bom` from 5.13.2 to 5.13.4
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.13.2...r5.13.4)

Updates `org.apache.maven.plugins:maven-gpg-plugin` from 3.2.7 to 3.2.8
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.2.7...maven-gpg-plugin-3.2.8)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-bom
  dependency-version: 1.74.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: maven-dependencies
- dependency-name: org.junit:junit-bom
  dependency-version: 5.13.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven-dependencies
- dependency-name: org.apache.maven.plugins:maven-gpg-plugin
  dependency-version: 3.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: serhatozdursun <serhat.ozdursun@gmail.com>

Author: dependabot[bot]

pom.xml

@@ -19,7 +19,7 @@
             <dependency>
                 <groupId>org.junit</groupId>
                 <artifactId>junit-bom</artifactId>
-                <version>5.13.2</version>
+                <version>5.13.4</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -195,7 +195,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>3.2.7</version>
+                <version>3.2.8</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>
@@ -317,7 +317,7 @@
         <maven.compiler.target>${java.version}</maven.compiler.target>
 
         <protobuf.version>4.31.1</protobuf.version>
-        <grpc.version>1.73.0</grpc.version>
+        <grpc.version>1.74.0</grpc.version>
     </properties>
 
 </project>