Relax tags parameter type in duplicate_inames to accept string tags (#997)

* relax tags type in duplicate_inames to accept string tags

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Co-authored-by: inducer <352067+inducer@users.noreply.github.com>

* Fix formatting

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: inducer <352067+inducer@users.noreply.github.com>
Co-authored-by: Andreas Kloeckner <inform@tiker.net>

Author: Copilot

loopy/transform/iname.py

@@ -961,12 +961,14 @@ def map_instruction(self,
 
 
 @for_each_kernel
-def duplicate_inames(kernel: LoopKernel,
-                     inames: ToInameStrSetConvertible,
-                     within: ToStackMatchConvertible,
-                     new_inames: InameStr | Sequence[InameStr | None] | None = None,
-                     suffix: str | None = None,
-                     tags: Mapping[str, Tag] | None = None) -> LoopKernel:
+def duplicate_inames(
+            kernel: LoopKernel,
+            inames: ToInameStrSetConvertible,
+            within: ToStackMatchConvertible,
+            new_inames: InameStr | Sequence[InameStr | None] | None = None,
+            suffix: str | None = None,
+            tags: Mapping[str, ToInameTagConvertible] | None = None
+        ) -> LoopKernel:
     """
     :arg within: a stack match as understood by :func:`loopy.match.parse_stack_match`.
     """