fix: Update tcpping to v2.6

[MattKobayashi]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

This PR updates the internal copy of the tcpping script to v2.6.

Benefits of this PR and context:

v2.6 of tcpping contains multiple bug fixes and new features.

How Has This Been Tested?

Container builds and runs successfully.

Source / References:

https://github.com/deajan/tcpping

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-5be6fcde-dev-3540ed1456caf8be463217d94fb2bae2feec0af7-pr-193/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-5be6fcde-dev-3540ed1456caf8be463217d94fb2bae2feec0af7-pr-193/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-5be6fcde-dev-3540ed1456caf8be463217d94fb2bae2feec0af7-pr-193	✅
arm64v8-2.8.2-r3-pkg-5be6fcde-dev-3540ed1456caf8be463217d94fb2bae2feec0af7-pr-193	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-ed6dce9e-dev-8b32364d1f1ef235142026b4d533e3705703c472-pr-193/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-ed6dce9e-dev-8b32364d1f1ef235142026b4d533e3705703c472-pr-193/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-ed6dce9e-dev-8b32364d1f1ef235142026b4d533e3705703c472-pr-193	✅
arm64v8-2.8.2-r3-pkg-ed6dce9e-dev-8b32364d1f1ef235142026b4d533e3705703c472-pr-193	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-8b437131-dev-668035806edcd71dac467800449582bf5f687def-pr-193/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-8b437131-dev-668035806edcd71dac467800449582bf5f687def-pr-193/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-8b437131-dev-668035806edcd71dac467800449582bf5f687def-pr-193	✅
arm64v8-2.8.2-r3-pkg-8b437131-dev-668035806edcd71dac467800449582bf5f687def-pr-193	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-53d767fd-dev-ae0a94e2f5ebf1550399813fd17f29343411ea96-pr-193/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-53d767fd-dev-ae0a94e2f5ebf1550399813fd17f29343411ea96-pr-193/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-53d767fd-dev-ae0a94e2f5ebf1550399813fd17f29343411ea96-pr-193	✅
arm64v8-2.8.2-r3-pkg-53d767fd-dev-ae0a94e2f5ebf1550399813fd17f29343411ea96-pr-193	✅

[thespad]

Superseded by #196