fix: ShellCheck SC2086

[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:

Fixes a reported instance of SC2086.

Benefits of this PR and context:

ShellCheck results from another PR showed an instance of SC2086. This PR fixes the issue.

How Has This Been Tested?

Container builds and runs successfully.

Source / References:

https://www.shellcheck.net/wiki/SC2086
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-b8b8881c-dev-21656cc84de83c64a7eadd1274301dccf54d6074-pr-189/shellcheck-result.xml

[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-b8b8881c-dev-20f18b5675f08cfe3cbcf6c1121ddffce158b9e6-pr-191/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-b8b8881c-dev-20f18b5675f08cfe3cbcf6c1121ddffce158b9e6-pr-191/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-b8b8881c-dev-20f18b5675f08cfe3cbcf6c1121ddffce158b9e6-pr-191	✅
arm64v8-2.8.2-r3-pkg-b8b8881c-dev-20f18b5675f08cfe3cbcf6c1121ddffce158b9e6-pr-191	❌

[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-047c0c5cc93beeacf2b3964e519a69d74941da9f-pr-191/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-ed6dce9e-dev-047c0c5cc93beeacf2b3964e519a69d74941da9f-pr-191/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-ed6dce9e-dev-047c0c5cc93beeacf2b3964e519a69d74941da9f-pr-191	✅
arm64v8-2.8.2-r3-pkg-ed6dce9e-dev-047c0c5cc93beeacf2b3964e519a69d74941da9f-pr-191	✅

[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-317ad1d78ee2851b827d94b62ca8b1ecbf0a7158-pr-191/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-8b437131-dev-317ad1d78ee2851b827d94b62ca8b1ecbf0a7158-pr-191/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-8b437131-dev-317ad1d78ee2851b827d94b62ca8b1ecbf0a7158-pr-191	✅
arm64v8-2.8.2-r3-pkg-8b437131-dev-317ad1d78ee2851b827d94b62ca8b1ecbf0a7158-pr-191	❌

[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-705510abf28a91f21b2be0c6a0863653aa2df621-pr-191/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-53d767fd-dev-705510abf28a91f21b2be0c6a0863653aa2df621-pr-191/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-53d767fd-dev-705510abf28a91f21b2be0c6a0863653aa2df621-pr-191	✅
arm64v8-2.8.2-r3-pkg-53d767fd-dev-705510abf28a91f21b2be0c6a0863653aa2df621-pr-191	❌

[thespad]

Superseded by #196