CI: do test mingit when appropriate

In 53038d4 (ci: avoid building the installer multiple times,
2023-08-28), I claimed that the MinGit artifact is already built in the
`sdk-artifacts` matrix.

That is only _kind_ of true: As part of building the `build-installers`
SDK artifact, there _is_ a part where the a minimal SDK is built, but
not MinGit.

Let's build MinGit again when code was touched that changes how it is
built.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/main.yml

@@ -56,8 +56,8 @@ jobs:
           git ls-files \*/release.sh | sed 's|[^/]*$||' | sort >releaseable.txt &&
           if grep -q test-sdk-artifacts=true $GITHUB_OUTPUT
           then
-            # These are already tested as part of the `sdk-artifacts` matrix
-            sed -i '/^\(installer\|mingit\)\/$/d' releaseable.txt
+            # This is already tested as part of the `sdk-artifacts` matrix
+            sed -i '/^\(installer\)\/$/d' releaseable.txt
           fi &&
           show_files releaseable.txt &&
           define_matrix artifacts releaseable.txt touched.txt artifacts.txt &&