Update axum requirement from 0.6 to 0.7

[dependabot[bot]]

Updates the requirements on axum to permit the latest version.

Release notes

Sourced from axum's releases.

axum-extra - v0.7.1

• Updated to latest axum-macros

Commits

• 773bb5d axum 0.7.1
• e63cc49 Update unix-domain-socket, listen-multiple-addrs, and testing examples (#2358)
• db344fa The main branch no longer contains breaking changes :tada:
• b7d14d3 Release axum 0.7 (#2354)
• 15781fe Prepare serve for potentially supporting graceful shutdown (#2357)
• da82e88 Update graceful shutdown example (#2355)
• 1a78e09 Apply changelog changes from 0.6 branch to main (#2353)
• 906f803 Update changelog (#2349)
• fc3cb44 Upgrade headers to 0.4.0 (#2351)
• a9ac524 Only enable hyper dependency when needed (#2350)
• Additional commits viewable in compare view

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[daaku]

@dependabot ignore this major version

[dependabot[bot]]

OK, I won't notify you about version 0.x.x again, unless you re-open this PR.