CI failure: msrv patch tokio-util

[lalitb]

Error - https://github.com/open-telemetry/opentelemetry-rust/actions/runs/10714378235/job/29707978476?pr=2073

error: package `tokio-util v0.7.12` cannot be built because it requires rustc 1.70 or newer, while the currently active rustc version is 1.65.0
Either upgrade to rustc 1.70 or newer, or use
cargo update -p tokio-util@0.7.12 --precise ver
where `ver` is the latest version of `tokio-util` supporting rustc 1.65.0
Error: Process completed with exit code 101.

The error is coming from opentelemetry-http which has msrv of 1.65.0. The tokio-util is optional dependency there (through tokio), so as of now, sticking to the last supported version of tokio-util should be fine.

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.9%. Comparing base (4a86e16) to head (27fee3e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2081     +/-   ##
=======================================
- Coverage   77.9%   77.9%   -0.1%     
=======================================
  Files        121     121             
  Lines      21143   21143             
=======================================
- Hits       16479   16478      -1     
- Misses      4664    4665      +1     

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