reword deprecated error slightly

"found" -> "reached" to match "reached unreachable code"

Author: andrewrk

src/Sema.zig

@@ -1409,7 +1409,7 @@ fn analyzeBodyInner(
                         if (!mod.allow_deprecated) {
                             const src_node: i32 = @bitCast(extended.operand);
                             const src = block.nodeOffset(src_node);
-                            return sema.fail(block, src, "found deprecated code", .{});
+                            return sema.fail(block, src, "reached deprecated code", .{});
                         }
 
                         i += 1;

test/cases/compile_errors/deprecated.zig

@@ -6,4 +6,4 @@ pub export fn foo() usize {
 
 // error
 //
-// :1:13: error: found deprecated code
+// :1:13: error: reached deprecated code

test/tests.zig

@@ -1180,7 +1180,7 @@ pub fn addCliTests(b: *std.Build) *Step {
         // Test `zig build -fallow-deprecated`.
 
         const deprecated_check: std.Build.Step.Run.StdIo.Check = .{
-            .expect_stderr_match = "found deprecated code",
+            .expect_stderr_match = "reached deprecated code",
         };
 
         const tmp_path = b.makeTempPath();