Release 0.5.1

POM.xml had gone missing in 0.5.0 artifact in maven central (even though the hashes for it are present). We're working with Sonatype to resolve the issue, but the only solution is to publish a new artifact.

There are no actual changes from 0.5.0.

PiperOrigin-RevId: 630182641

Author: l46kok

README.md

@@ -55,14 +55,14 @@ CEL-Java is available in Maven Central Repository. [Download the JARs here][8] o
 <dependency>
   <groupId>dev.cel</groupId>
   <artifactId>cel</artifactId>
-  <version>0.5.0</version>
+  <version>0.5.1</version>
 </dependency>
 ```
 
 **Gradle**
 
 ```gradle
-implementation 'dev.cel:cel:0.5.0'
+implementation 'dev.cel:cel:0.5.1'
 ```
 
 Then run this example:

publish/cel_version.bzl

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """Maven artifact version for CEL."""
-CEL_VERSION = "0.5.0"
+CEL_VERSION = "0.5.1"