Python: Fix shared QLDoc for InstanceSource

Author: RasmusWL

python/ql/src/experimental/semmle/python/frameworks/Django.qll

@@ -558,7 +558,7 @@ private module Django {
            * A source of an instance of `django.http.request.HttpRequest`.
            *
            * This can include instantiation of the class, return value from function
-           * calls, or a special parameter that will be set when functions are call by external
+           * calls, or a special parameter that will be set when functions are called by an external
            * library.
            *
            * Use `django::http::request::HttpRequest::instance()` predicate to get

python/ql/src/experimental/semmle/python/frameworks/Fabric.qll

@@ -459,7 +459,7 @@ private module FabricV2 {
          * A source of an instance of a subclass of `fabric.group.Group`
          *
          * This can include instantiation of a class, return value from function
-         * calls, or a special parameter that will be set when functions are call by external
+         * calls, or a special parameter that will be set when functions are called by an external
          * library.
          *
          * Use `Group::subclassInstance()` predicate to get references to an instance of a subclass of `fabric.group.Group`.