Changing httpRuntime targetFramework to 4.6.2

Author: fabiocav

src/WebJobs.Script.WebHost/Web.config

@@ -35,7 +35,12 @@
           <clear />
         </namespaces>
       </pages>
-      <httpRuntime targetFramework="4.7.1" maxRequestLength="102400" maxUrlLength="8192" maxQueryStringLength="4096" requestPathInvalidCharacters="" enableVersionHeader="false"/>
+      <!-- Do not change the targetFramework version to match the current framework target.
+           Common customer dependencies (e.g. ADAL) rely on legacy framework behavior and changing
+           this is a breaking change for them. Before making any changes, please make sure this is
+           discussed and validated.
+       -->
+      <httpRuntime targetFramework="4.6.2" maxRequestLength="102400" maxUrlLength="8192" maxQueryStringLength="4096" requestPathInvalidCharacters="" enableVersionHeader="false"/>
     </system.web>
   </location>
   <system.webServer>