C#: update some test cases

Author: Jami Cogswell

csharp/ql/test/library-tests/dataflow/external-models/sinks.expected

@@ -1,8 +1,8 @@
 invalidModelRow
 #select
-| Sinks.cs:8:19:8:22 | access to local variable arg1 | code |
+| Sinks.cs:8:19:8:22 | access to local variable arg1 | code-injection |
 | Sinks.cs:11:13:11:41 | this access | remote |
 | Sinks.cs:11:30:11:40 | access to local variable argToTagged | remote |
-| Sinks.cs:14:27:14:36 | access to local variable fieldWrite | sql |
+| Sinks.cs:14:27:14:36 | access to local variable fieldWrite | sql-injection |
 | Sinks.cs:20:20:20:22 | access to local variable res | xss |
 | Sinks.cs:27:20:27:25 | access to local variable resTag | html |

csharp/ql/test/library-tests/frameworks/EntityFramework/FlowSummaries.expected

@@ -134,9 +134,9 @@ summary
 neutral
 sourceNode
 sinkNode
-| EntityFrameworkCore.cs:72:36:72:40 | "sql-injection" | sql |
-| EntityFrameworkCore.cs:73:40:73:44 | "sql-injection" | sql |
-| EntityFrameworkCore.cs:74:40:74:44 | "sql-injection" | sql |
-| EntityFrameworkCore.cs:75:51:75:55 | "sql-injection" | sql |
-| EntityFrameworkCore.cs:76:51:76:55 | "sql-injection" | sql |
-| EntityFrameworkCore.cs:77:51:77:55 | "sql-injection" | sql |
+| EntityFrameworkCore.cs:72:36:72:40 | "sql" | sql-injection |
+| EntityFrameworkCore.cs:73:40:73:44 | "sql" | sql-injection |
+| EntityFrameworkCore.cs:74:40:74:44 | "sql" | sql-injection |
+| EntityFrameworkCore.cs:75:51:75:55 | "sql" | sql-injection |
+| EntityFrameworkCore.cs:76:51:76:55 | "sql" | sql-injection |
+| EntityFrameworkCore.cs:77:51:77:55 | "sql" | sql-injection |