Bump mojo-regex to 0.7.0 for Mojo 0.26.2

[msaelices]

Summary

Bump mojo-regex recipe from 0.6.0 to 0.7.0 for Mojo 0.26.2.

Changes in 0.7.0

• Route grouped literal alternations to DFA engine (80-167x faster)
• Use SIMD matcher to skip non-matching positions in match_all (8-16x faster)
• Add zero-allocation is_match_char for NFA character matching (4.5-14.5x faster)
• Fix SIMD character class matcher silently disabled by Mojo 0.26.2 Optional bug (2.6-3.9x faster)
• Pre-allocate String capacity in range expansion loops (1.3-2x faster)
• Optimize negated character class transition building
• Replace all fn with def, fix all compiler warnings
• Zero compiler warnings

See full changelog: https://github.com/msaelices/mojo-regex/blob/main/docs/changelog.md

[sstadick]

@msaelices Just an FYI there are conflicts!