Add atomic maps supporter (#380)

**Related Issue(s):**

- #

**Description:**


**PR Checklist:**

- [ ] Code is formatted and linted (run `pre-commit run --all-files`)
- [ ] Tests pass (run `make test`)
- [ ] Documentation has been updated to reflect changes, if applicable
- [ ] Changes are added to the changelog

Author: jamesfisher-geo

README.md

@@ -17,8 +17,13 @@ The following organizations have contributed time and/or funding to support the
 
 <p align="left">
   <a href="https://healy-hyperspatial.github.io/">
-    <img src="assets/hh-logo-blue.png" alt="Healy Hyperspatial" height="120">
+    <img src="https://raw.githubusercontent.com/stac-utils/stac-fastapi-elasticsearch-opensearch/refs/heads/main/assets/hh-logo-blue.png" alt="Healy Hyperspatial" height="120">
   </a>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+  <a href="https://atomicmaps.io/">
+    <img src="https://raw.githubusercontent.com/stac-utils/stac-fastapi-elasticsearch-opensearch/refs/heads/main/assets/am-logo-black.png" alt="Atomic Maps" height="120">
+  </a>
+</p>
 
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