Update since-build and until-build for 2021.2

I forgot to do it sooner, but it's not that important because it only
 affects development (like inspections,) but I like consistency

Author: RedNesto

src/main/resources/META-INF/plugin.xml

@@ -33,7 +33,7 @@
     </change-notes>
 
     <!-- please see https://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html for description -->
-    <idea-version since-build="211.4961.33" until-build="211.*"/>
+    <idea-version since-build="212.4746.92" until-build="212.*"/>
 
     <extensions defaultExtensionNs="com.intellij">
         <!-- This is grouped in the following order EXCEPT for localInspections and moduleTypes. All localInspections are grouped at the