docs: add a note about format option

coverallsapp · Apr 3, 2023 · 67cf86c · 67cf86c
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commit 67cf86c
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diff --git a/UPGRADE.md b/UPGRADE.md
@@ -8,3 +8,4 @@ Notable changes:
 
 - You can skip `file` option and coveralls will try to find all supported coverage files and combine their data.
 
+- If coveralls fails to determine your coverage report format, use explicit `format` option to specify it. See [supported values](https://github.com/coverallsapp/coverage-reporter#supported-coverage-report-formats).