Bump defmt-rtt from 1.1.0 to 1.2.0

[dependabot]

Bumps defmt-rtt from 1.1.0 to 1.2.0.

Changelog

Sourced from defmt-rtt's changelog.

[defmt-v1.1.0] (2026-05-12)

• #974 Ensure typechecking is still performed on disabled log statement.
• #960 Fix Format not accepting multiple helper attribute instances
• #937 add support for #[defmt(transparent)] on Format derive
• #959 Missing "unstable-test" cfg in tests module
• #956 Link LICENSE-* in the crate folder
• #955 Allow using the defmt/alloc feature on bare metal ESP32-S2
• #972 Fix logic bug in env_filter
• #1007 defmt: impl Format for core::fmt::Error
• #983 Add Format implementation for core::num::Wrapping<T>
• #1022 Re-fix accidental breaking change in Format macro
• #1041 Ignore RUSTSEC-2026-0009
• #1052 Pin UI tests to host MSRV

[defmt-v1.0.1] (2025-04-01)

• #954 Fix accidental breaking change in Format macro

[defmt-v1.0.0] (2025-04-01)

• #909 First 1.0 stable release 🎉
• #938 Emit option_env!("DEFMT_LOG") so rustc depinfo can track it
• #935 Add note in book's setup chapter to clarify staticlib setup
• #914 Add cargo-deny as a CI action to check crate security and licensing

[defmt-v0.3.100] (2025-04-01)

• #909 Re-exports defmt-1.0.0

[defmt-v0.3.10] (2024-11-29)

• #902 Minor change to Format impl for core::panic::PanicInfo, eliding a lifetime specifier to satisfy Clippy 1.83.
• #899 Pin the defmt-macro crate to avoid incompatible versions being used together

[defmt-v0.3.9] (2024-11-27)

• #889 Add script for book hosting
• #887 Fix interning example in the book
• #884 Upgrade dependencies: notify is now at v7, thiserror is now at v2
• #883 Mark decoder and parser not as unstable anymore
• #880 Merge function calls emitted by the macro to save space.
• #874 defmt: Fix doc test
• #872 defmt: Add expect! as alias for unwrap! for discoverability
• #871 Set MSRV to Rust 1.76
• #869 macros: Add missing type hints
• #865 defmt: Replace proc-macro-error with proc-macro-error2
• #858 defmt: Implement "passthrough" trait impls for *2Format wrappers
• #857 Add an octal display hint (:o)
• #856 defmt: Add a Format impl for PanicInfo and related types.

... (truncated)

Commits

• 86c3c50 Bump defmt version
• 02841ea Bump changelog sections
• 3c95ffb Bump crate versions
• 3ac30de Bump qemu-run to 0.3.0
• 5bdb1bd Also support single arguments to qemu-run
• 8b3c207 Update CHANGELOG
• 13be3fd qemu-run supports --arg foo=bar to pass -foo bar to qemu.
• d477bf3 Exclude defmt-test from cargo-semver-checks
• 9ba998d Add changelog entry for semihosting crate migration
• 716a714 Update QEMU test fw to use generic semihosting crate
• Additional commits viewable in compare view

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