fix: increase l1 propose gas estimate

[just-mitch]

gas costs 60k per validator to setup epoch.
But we don't know how many validators we have necessarily.

[github-actions]

Changes to circuit sizes

Generated at commit: dc0d3965a81a3cc4ef93d456e4f921096d46c7b2, compared to commit: 2c28dda02e568fddbff5e6e0337f374925445b65

🧾 Summary (100% most significant diffs)

Program	ACIR opcodes (+/-)	%	Circuit size (+/-)	%
rollup_root	+21,280 ❌	+105.14%	+51,786 ❌	+2.68%
rollup_block_merge	+21,280 ❌	+105.06%	+51,786 ❌	+2.68%
rollup_block_root_empty	+32 ❌	+34.41%	+32 ❌	+1.11%
rollup_block_root	+32 ❌	+0.77%	+32 ❌	+0.00%

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Full diff report 👇

Program	ACIR opcodes (+/-)	%	Circuit size (+/-)	%
rollup_root	41,519 (+21,280)	+105.14%	1,983,340 (+51,786)	+2.68%
rollup_block_merge	41,535 (+21,280)	+105.06%	1,983,356 (+51,786)	+2.68%
rollup_block_root_empty	125 (+32)	+34.41%	2,907 (+32)	+1.11%
rollup_block_root	4,186 (+32)	+0.77%	2,837,152 (+32)	+0.00%