Fix typo in jupyter spelling (#18191)

Author: djdefi

data/release-notes/3-0/0.yml

@@ -124,7 +124,7 @@ sections:
     - 'Duplicated logging to `/var/log/messages`, `/var/log/syslog`, and `/var/log/user.log` results in increased root volume utilization.'
     - Users can dismiss a mandatory message without checking all checkboxes.
     - Repository [deploy keys](/developers/overview/managing-deploy-keys) are unable to be used with repositories containing LFS objects.
-    - Juypter Notebook rendering in the web UI may fail if the notebook includes non UTF-8 encoded characters.
+    - Jupyter Notebook rendering in the web UI may fail if the notebook includes non UTF-8 encoded characters.
 
   deprecations:
     - heading: Deprecation of GitHub Enterprise Server 2.19

data/release-notes/3-0/1.yml

@@ -36,4 +36,4 @@ sections:
     - 'Duplicated logging to `/var/log/messages`, `/var/log/syslog`, and `/var/log/user.log` results in increased root volume utilization.'
     - 'Users can dismiss a mandatory message without checking all checkboxes.'
     - 'Repository [deploy keys](/developers/overview/managing-deploy-keys) are unable to be used with repositories containing LFS objects.'
-    - 'Juypter Notebook rendering in the web UI may fail if the notebook includes non UTF-8 encoded characters.'
+    - 'Jupyter Notebook rendering in the web UI may fail if the notebook includes non UTF-8 encoded characters.'