deps: update dependency com.google.cloud:gapic-libraries-bom to v1.26.0

Author: renovate-bot

google-cloud-bigtable-deps-bom/pom.xml

@@ -66,7 +66,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>gapic-libraries-bom</artifactId>
-        <version>1.25.0</version>
+        <version>1.26.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>