fix SH version in get.sh file

[codacy-production[bot]]

Coverage summary from Codacy

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Coverage variation	Diff coverage
:white_check_mark: +7.41% (target: -1.00%)	∅

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (a26475b2e80431d9c2e86cf273bb62d76d4f9c85) | 726 | 544 | 74.93% | | | Head commit (a9d163505b599ee4c9020c603d341154862f18bd) | 436 (-290) | 359 (-185) | 82.34% (**+7.41%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#482) | 0 | 0 | **∅ (not applicable)** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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