help/garage: update disruption news

Author: rkdarst

help/garage.rst

@@ -9,7 +9,7 @@ Scicomp garage
 .. admonition:: Planned disruptions
    :class: important
 
-   * September 30: We do have an internal development day. There is no garage session.
+   * We don't know of any upcoming disruptions to the garage scheduce.
 
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