Bump coverage[toml] from 7.6.1 to 7.6.3 #4956

Job	Run time
Package Briefcase / Create Python Package	15s
Pre-commit checks / Pre-commit Checks	43s
Package Automation / Create Python Package	25s
Check towncrier / Towncrier Checks	30s
Unit tests (macos-12, 3.9)	2m 0s
Unit tests (macos-12, 3.12)	2m 32s
Unit tests (macos-12, 3.13-dev)	3m 20s
Unit tests (macos-14, 3.9)	1m 11s
Unit tests (macos-14, 3.12)	1m 12s
Unit tests (macos-14, 3.13-dev)	1m 42s
Unit tests (windows-latest, 3.9)	2m 41s
Unit tests (windows-latest, 3.12)	2m 39s
Unit tests (windows-latest, 3.13-dev)	3m 45s
Unit tests (ubuntu-latest, 3.9)	1m 30s
Unit tests (ubuntu-latest, 3.12)	2m 2s
Unit tests (ubuntu-latest, 3.13-dev)	2m 14s
Unit tests (ubuntu-latest, 3.10, false)	1m 39s
Unit tests (ubuntu-latest, 3.11, false)	1m 33s
Project coverage	42s
Build app	0s
Verify project	0s
	32m 35s

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