python-setuptools_scm: fix signature file mismatch causing build failure (#8518)

SPECS/python-setuptools_scm/python-setuptools_scm.signatures.json

@@ -1,5 +1,5 @@
 {
   "Signatures": {
-    "setuptools_scm-8.0.3.tar.gz": "0169fd70197efda2f8c4d0b2a7a3d614431b488116f37b79d031e9e7ec884d8c"
+    "setuptools-scm-8.0.3.tar.gz": "0169fd70197efda2f8c4d0b2a7a3d614431b488116f37b79d031e9e7ec884d8c"
   }
 }