Add May announcements and sync wiki submodule

challenges.md

@@ -9,34 +9,43 @@ Welcome to our monthly 3D printing challenges! Each month features a unique them
 
 ## Active Challenge
 
-### May 2026: "Bring an Experiment (Round 2!)"
+### June 2026: "[Theme TBD]"
 
-**Theme**: Try something new, crazy, or wild! Bring in an experiment, even if it's a failed print / spaghetti.
+**Theme**: [TBD]
 
 **Key Details**:
 
-- **Model**: Any experimental print (failures encouraged!)
-- **Goal**: Share what you tried, why you tried it, and if it worked or failed.
-- **Voting**: Group vote for favorite experimental attempt
+- **Model**: [TBD]
+- **Goal**: [TBD]
+- **Voting**: Group vote for favorite attempt
 
 **[View Full Challenge Details](https://meetup.fargo3d.com/Fargo3d/3DPrintMeetup/wiki/Current-Challenge)**
 
 ## Upcoming Challenge
 
-### June 2026: "[Theme TBD]"
+### July 2026: "[Theme TBD]"
 
 **Status**: Planning in progress
 
 **Expected Timeline**:
 
-- **Announcement**: May meeting (May 20th, 2026)
-- **Submission Period**: June 2026
-- **Judging**: June 2026
+- **Announcement**: June meeting (June 2026)
+- **Submission Period**: July 2026
+- **Judging**: July 2026
 
-**[View Challenge Placeholder](./challenges/June-2026/readme.md)**
+**[View Challenge Placeholder](./challenges/July-2026/readme.md)**
 
 ## Challenge Archive
 
+### 2026 Challenges
+
+| Month | Challenge Name | Theme | Status |
+|-------|---------------|-------|--------|
+| April | "Bring an Experiment" | Try something new | **Archived** |
+| May | "Bring an Experiment (Round 2!)" | Try something new, crazy, or wild | **Archived** |
+| June | [TBD] | [TBD] | **Active** |
+| July | [TBD] | [TBD] | Planning |
+
 ### 2025 Challenges
 
 | Month | Challenge Name | Theme | Status |