📆 Update final revision deadline and subsequent dates

Author: fwkoch

README.md

@@ -121,12 +121,12 @@ In addition to the following list, we break up the deadlines in the respective d
 - Aug 9: Final review deadline
   - Reviewers must be done with their reviews at this point.
   - Authors continue to make revisions in response to final review comments during this period.
-- Aug 15: Final author revision deadline
-- Aug 15: Open Review Period ends
+- Aug 22: Final author revision deadline
+- Aug 22: Open Review Period ends
   - Authors put down their pens.
   - Reviewers make an up or down decision on publication readiness of papers during this period.
-- Aug 23: Final reviewer decision deadline
-- Aug 30: Proceedings final sign-off by editors
+- Aug 30: Final reviewer decision deadline
+- Sept 6: Proceedings final sign-off by editors
   - The publication process begins after final sign-off.
 
 ## Instructions for Authors
@@ -183,7 +183,7 @@ A member of the Proceedings Co-chairs will help you directly or identify a work-
 - Jul 10: Initial complete review
   - At this point, the author should consider their submission a final draft.
   - Any author revisions should only be in response to reviewer comments.
-- Aug 15: Final author revision deadline
+- Aug 22: Final author revision deadline
   - Authors put down their pens.
 
 ### General Information and Guidelines for Authors
@@ -418,10 +418,10 @@ _Final Reviewer Decision_ deadline.
   - Authors also respond to review comments with further improvements to papers during this period.
 - Aug 9: Final review deadline
   - Authors continue to make revisions in response to final review comments during this period.
-- Aug 15: Final author revision deadline
+- Aug 22: Final author revision deadline
   - Authors put down their pens.
   - Reviewers make an up or down decision on publication readiness of papers during this period.
-- Aug 23: Final reviewer decision deadline
+- Aug 30: Final reviewer decision deadline
 
 ### Reviewer Workflow
 
@@ -475,7 +475,7 @@ To information about how to manage the whole proceedings, please see
 
 - May 2: Authors invited to submit full papers
   - The [build process](#build-process) is supported by Curvenote (a SciPy sponsor) and it is maintained throughout this period.
-- Aug 30: Proceedings final sign-off by editors
+- Sept 6: Proceedings final sign-off by editors
   - The publication process begins after final sign-off.
 
 ### Instructions for Editors
@@ -503,7 +503,7 @@ Editors should come to a final 'ready', 'unready' decision before the **Final Ed
   - Reviewers continue to comment on paper improvements during this period.
   - Authors also respond to review comments with further improvements to papers during this period.
   - Editors should verify that reviews have been completed
-- Aug 30: Proceedings final sign-off by editors
+- Sept 6: Proceedings final sign-off by editors
   - The publication process begins after final sign-off.
 
 ## Instructions for Slides