Update Layout Builder Browser image paths so they'll work on Pantheon

...t_builder_browser_block.inline_blockuw_cbl_blockquote.yml

...ilder_browser_block.inline_blockuw_cbl_call_to_action.yml

...ut_builder_browser_block.inline_blockuw_cbl_copy_text.yml

...er_browser_block.inline_blockuw_cbl_facts_and_figures.yml

..._builder_browser_block.inline_blockuw_cbl_google_maps.yml

...layout_builder_browser_block.inline_blockuw_cbl_image.yml

...uilder_browser_block.inline_blockuw_cbl_image_gallery.yml

...ut_builder_browser_block.inline_blockuw_cbl_instagram.yml

...yout_builder_browser_block.inline_blockuw_cbl_mailman.yml

...yout_builder_browser_block.inline_blockuw_cbl_powerbi.yml

...uilder_browser_block.inline_blockuw_cbl_related_links.yml

...builder_browser_block.inline_blockuw_cbl_remote_video.yml

...yout_builder_browser_block.inline_blockuw_cbl_tableau.yml

...out_builder_browser_block.inline_blockuw_cbl_timeline.yml

...owser.layout_builder_browser_block.uw_cbl_blog_teaser.yml

...wser.layout_builder_browser_block.uw_cbl_event_teaser.yml

...r.layout_builder_browser_block.uw_cbl_multi_type_list.yml

...owser.layout_builder_browser_block.uw_cbl_news_teaser.yml

..._browser.layout_builder_browser_block.uw_lbb_facebook.yml

...r_browser.layout_builder_browser_block.uw_lbb_twitter.yml