[clang] [clang-format] Fix bad indentation with attribute and templated type (PR #76336)

[Owen Pan via cfe-commits]

================
@@ -26492,6 +26492,10 @@ TEST_F(FormatTest, BreakAfterAttributes) {
   verifyFormat("[[nodiscard]]\n"
                "Foo& operator-(Foo&);",
                Style);
+
+  verifyFormat("[[maybe_unused]]\n"
+               "foo<int> f;",
----------------
owenca wrote:

```suggestion
               "foo<int> k;",
```
See below.

https://github.com/llvm/llvm-project/pull/76336