Update 7 files Logos CCC

• /public/images/news/ccc/munich500.png
• /public/images/news/ccc/Blackforest500.png
• /public/images/news/ccc/berlin-370.png
• /public/images/news/ccc/hamburg.png
• /public/images/news/ccc/creacities.png
• /public/images/news/ccc/circonnact500.jpeg
• /public/images/news/ccc/Materialkreislauf500.png