.github/workflows/lock.yml: Fix ISO 8601 date format

.github/workflows/lock.yml

@@ -18,12 +18,12 @@ jobs:
             If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.
           issue-lock-inactive-days: '30'
           # Issues older than 180 days ago should be ignored
-          issue-exclude-created-before: '2020-01-11'
+          issue-exclude-created-before: '2020-11-01'
           pr-lock-comment: >
             I'm going to lock this pull request because it has been closed for _30 days_ ⏳. This helps our maintainers find and focus on the active issues.
 
             If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.
           pr-lock-inactive-days: '30'
           # Issues older than 180 days ago should be ignored
-          pr-exclude-created-before: '2020-01-11'
+          pr-exclude-created-before: '2020-11-01'