[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/scanpy/preprocessing/_pca/_kernels.py

@@ -8,7 +8,7 @@
 from scanpy._compat import CSRBase
 
 if TYPE_CHECKING:
-    from numpy.typing import DTypeLike, NDArray
+    from numpy.typing import NDArray
 
 
 @njit
@@ -30,6 +30,7 @@ def _csr_gram_upper_triangular(
         for j in range(i):
             out[i, j] = out[j, i]
 
+
 @njit
 def _csr_gram_full(
     mat: CSRBase,