chore(deps): update CocoaPods version to 1.9.1 (#5843)

Co-authored-by: Rhys Arkins <rhys@arkins.net>
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

Dockerfile

@@ -162,7 +162,7 @@ RUN apt-get update && apt-get install -y ruby ruby2.5-dev && rm -rf /var/lib/apt
 RUN ruby --version
 
 # renovate: datasource=rubygems depName=cocoapods versioning=ruby
-ENV COCOAPODS_VERSION 1.9.0
+ENV COCOAPODS_VERSION 1.9.1
 RUN gem install --no-rdoc --no-ri cocoapods -v ${COCOAPODS_VERSION}
 
 USER ubuntu