fix(pub): Use the correct key name when replacing options

In ff0ca15, `OPTION_GRADLE_VERSION` (which equals "gradleVersion") was
errorneously replaced with `gradleFactory.type` (which equals "Gradle")
in two places. One of these was fixed in 1ba253a. Fix the other one
here.

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

plugins/package-managers/pub/src/main/kotlin/Pub.kt

@@ -452,7 +452,7 @@ class Pub(
 
             val gradleAnalyzerConfig = analyzerConfig.withPackageManagerOption(
                 "Gradle",
-                gradleFactory.type,
+                OPTION_GRADLE_VERSION,
                 pubGradleVersion
             )