Release v1.3.0 as versionCode 130

The v1.3.1 bump left versionCode at 131 after the release name went back to
1.3.0, breaking the convention where the code mirrors the version name. Nothing
is published at 131 yet, so correct it before release and rename the F-Droid
changelog to match.

Author: Gent8

app/build.gradle.kts

@@ -62,7 +62,7 @@ android {
     defaultConfig {
         applicationId = "com.gent8.taison"
 
-        versionCode = 131
+        versionCode = 130
         versionName = "1.3.0"
 
         buildConfigField("String", "COMMIT_COUNT", "\"${getLatestCommitCount()}\"")