chore: bump com.google.cloud:libraries-pom version to 26.76.0

PiperOrigin-RevId: 875693121

Author: tilgalas

pom.xml

@@ -77,7 +77,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>26.53.0</version>
+        <version>26.76.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>