GitHub Actions: update actions/upload-artifact [v2 -> v3]

Author: greenrobot-team

.github/workflows/lint.yml

@@ -66,7 +66,7 @@ jobs:
           targetdir: 'coveragereport'
           reporttypes: 'HtmlInline' # The output formats and scope (separated by semicolon) Values: Badges, Clover, Cobertura, CsvSummary, Html, HtmlChart, HtmlInline, HtmlInline_AzurePipelines, HtmlInline_AzurePipelines_Dark, HtmlSummary, JsonSummary, Latex, LatexSummary, lcov, MarkdownSummary, MHtml, PngChart, SonarQube, TeamCitySummary, TextSummary, Xml, XmlSummary
           sourcedirs: 'objectbox'
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: CoverageReport # Artifact name
           path: coveragereport # Directory containing files to upload