Bump up Instant60 custom EEPROM offsets to avoid conflict

[bcat]

• The Instant60 PCB supports Via (not sure if this is official, since it wasn't updated with the other Via PCBs), and it has the same address conflict that the other Via-supported PCBs did. This leads to weirdness with Ctrl and Super keys swapping. I'm bumping the EEPROM offsets to fix this issue.

• Tested on my Instant60 PCB with both non-Via and Via keymaps. No key swapping in either case. For Via keymap, I was able to edit in keycodes and they worked fine.

• @awkannan, it looks like the AN-C 60% PCB needs the same fix, but I don't have a physical one of these to test. I can send a PR for it (seems to be the same basic PCB, just not hotswap), but am a bit nervous making an untested change like that. Let me know if you'd like me to do this.

• Questions: Should I bump the EEPROM_MAGIC for this board (it has a custom value) to force an EEPROM reset after this change? And does this need to go out via the breaking changes process? It seems like maybe it should... but this keyboard is already broken due to the Ctrl/Super swap, and it seems like the other EEPROM offset fixes were rolled out immediately, so maybe not?

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

• Issue Ctrl and OS keys swapped in Ergodox EZ #6589 for Instant60 PCB

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[drashna]

@awkannan Any issues with this?

[bcat]

So I asked on CannonKeys Discord and it seems they have another PR for this. I can close this one then.