deps: Use Gapic-Showcase v0.35.1 (#3018)

Fixes: #2695

Author: lqiu96

showcase/gapic-showcase/pom.xml

@@ -19,7 +19,7 @@
   </parent>
 
   <properties>
-    <gapic-showcase.version>0.35.0</gapic-showcase.version>
+    <gapic-showcase.version>0.35.1</gapic-showcase.version>
   </properties>
 
   <build>