docs(known-instances): add Alliance of Hessian Libraries (#611)

Signed-off-by: Markus Sommer <markus@splork.de>

.github/actions/spelling/expect.txt

@@ -11,7 +11,7 @@ archlinux
 badregexes
 berr
 bingbot
-Bitcoin
+bitcoin
 blogging
 Bluesky
 blueskybot
@@ -100,6 +100,7 @@ Hashcash
 hashrate
 headermap
 healthcheck
+hebis
 hec
 hmc
 hostable
@@ -236,6 +237,7 @@ Tik
 Timpibot
 torproject
 traefik
+uberspace
 unixhttpd
 unmarshal
 uvx
@@ -251,6 +253,7 @@ webpage
 websecure
 websites
 Webzio
+wildbase
 wordpress
 Workaround
 workdir

docs/docs/user/known-instances.md

@@ -63,3 +63,10 @@ This page contains a non-exhaustive list with all websites using Anubis.
   <summary>The United Nations</summary>
   - https://policytoolbox.iiep.unesco.org/
   </details>
+- <details>
+  <summary>hebis (Alliance of Hessian Libraries)</summary>
+  - https://ubmr.hds.hebis.de/
+  - https://tufind.hds.hebis.de/
+  - https://karla.hds.hebis.de/
+  - and many more (see https://www.hebis.de/dienste/hebis-discovery-system/)
+  </details>