chore: Attempt to fix uri gem issue for generation tools (#17123)

Author: dazuma

.toys/generate-updates.rb

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+require "uri"
+
 desc "Run standard Google client generation."
 
 flag :git_remote, "--remote=NAME" do

.toys/generate.rb

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+require "uri"
+
 desc "Run standard Google client generation."
 
 optional_arg :api, desc: "API name (optional). Generates all APIs if omitted."