[CI] Fix [develop] target for twine

[basepi]

When I released v1.1.0 twine complained about the [develop] deps targeting elastic-apm@master. Trying this to see if both the CI and twine can be pleased.

Ref #68

[ghost]

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• Start Time: 2021-10-26T17:58:05.518+0000

• Duration: 9 min 32 sec

• Commit: 2dceea1

Test stats 🧪

Test	Results
Failed	0
Passed	162
Skipped	0
Total	162

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