Adds news post for RSD launch

This is the news post for the RSD launch that is scheduled for today.

@jandt-desy @konrad @frust45 It would be great to hear you opinion about the post.

I could not figure out how to use breakpoints so that float-right is only for larger screens, e.g. > md.

Review link

_posts/2022/07/2022-07-29-Newsletter.md

+---
+title: "HIFIS has a newsletter!"
+title_image: paula-hayes-Eeee5H-yuoc-unsplash.jpg
+data: 2022-07-29
+authors:
+  - klaffki
+layout: blogpost
+categories:
+  - News
+tags:
+  - Newsletter
+excerpt: >
+    Subscribe to our newsletter to get the second edition in october!
+---
+
+## We just published the first issue of our quarterly HIFIS Newsletter
+
+<figure>
+    <img src="{% link assets/img/posts/2022-07-newsletter/Sam_hi.png
+ %}" alt="person raising their hand" style="float:right;width:7%;min-width:100px;padding:5px 0px 20px 20px;">
+</figure>
+
+If you missed it, you can read the [HTML]({% link newsletter/2022-07/2022-07-HIFIS-Newsletter.html %}) or [PDF version]({% link newsletter/2022-07/2022-07-HIFIS-Newsletter.pdf %}) of the July issue.
+Within our newsletter, you can meet Sam Scientist who will accompany us from now on and tell us about their experiences with HIFIS.
+The newsletter features the latest engaging community use cases that show how HIFIS services contribute to and supporte scientific challenges.
+
+Of course, there are also news in the literal sense in each issue, informing you about important current developments within HIFIS.
+There's also a section for information from HIFIS Education, advertising the next course or sharing some tips and tricks.
+You will also find news and interesting content from the Helmholtz Cloud or HIFIS Software.
+And, last but not least, we share current information or calls from other Incubator plattforms and
+provide a link to the job search for data science jobs at Helmholtz, curated by HIDA. 
+
+
+## Don't want to miss the next newsletter?
+Subscribe [here](https://lists.desy.de/sympa/subscribe/hifis-newsletter) to get the second edition in october and 
+all further newsletters automatically!
+The growing archive will be kept [here]({% link newsletter/index.md %}).