Fix bazel query statement in java tutorial for Windows

On Windows cmd.exe terminal, we should use double quote, and \ cannot be used to separate lines.

Addressing https://github.com/bazelbuild/bazel/issues/5254#issuecomment-417367939

RELNOTES: Note
PiperOrigin-RevId: 211087172
diff --git a/site/docs/tutorial/java.md b/site/docs/tutorial/java.md
index b1ed79d..5b35c5d 100644
--- a/site/docs/tutorial/java.md
+++ b/site/docs/tutorial/java.md
@@ -187,8 +187,7 @@
 representation of the dependency graph (run the command at the workspace root):
 
 ```
-bazel query  --nohost_deps --noimplicit_deps 'deps(//:ProjectRunner)' \
-  --output graph
+bazel query  --nohost_deps --noimplicit_deps "deps(//:ProjectRunner)" --output graph
 ```
 
 The above command tells Bazel to look for all dependencies for the target