Fix concurrency issue in DialAndSendWithContext #136

Job	Run time
Test with Codecov coverage (ubuntu-latest / 1.23)	57s
Go vulnerabilities check	22s
Dependency review	12s
golangci-lint (1.23)	33s
REUSE Compliance Check	16s
Test with SonarQube review (ubuntu-latest / 1.23)	1m 59s
Test (macos-latest / 1.19)	40s
Test (macos-latest / 1.20)	32s
Test (macos-latest / 1.21)	30s
Test (macos-latest / 1.22)	27s
Test (macos-latest / 1.23)	31s
Test (ubuntu-latest / 1.19)	35s
Test (ubuntu-latest / 1.20)	30s
Test (ubuntu-latest / 1.21)	27s
Test (ubuntu-latest / 1.22)	32s
Test (ubuntu-latest / 1.23)	34s
Test (windows-latest / 1.19)	1m 3s
Test (windows-latest / 1.20)	1m 48s
Test (windows-latest / 1.21)	1m 40s
Test (windows-latest / 1.22)	1m 47s
Test (windows-latest / 1.23)	1m 44s
Test on FreeBSD 13.4'	2m 12s
Test on FreeBSD 14.0	2m 14s
Test on FreeBSD 14.1	2m 12s
	24m 17s

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