fix build

Author: RenderMichael

dotnet/src/webdriver/BUILD.bazel

@@ -37,7 +37,7 @@ csharp_library(
         "WebDriver.Common.Tests",
     ],
     langversion = "12.0",
-    nullable="annotations"
+    nullable="annotations",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",
@@ -77,7 +77,7 @@ csharp_library(
         "WebDriver.Common.Tests",
     ],
     langversion = "12.0",
-    nullable="enable"
+    nullable="enable",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",
@@ -105,7 +105,7 @@ csharp_library(
     out = "WebDriver.StrongNamed",
     keyfile = "//dotnet:WebDriver.snk",
     langversion = "12.0",
-    nullable="annotations"
+    nullable="annotations",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",
@@ -143,7 +143,7 @@ csharp_library(
     ],
     keyfile = "//dotnet:WebDriver.snk",
     langversion = "12.0",
-    nullable="enable"
+    nullable="enable",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",