chore(deps): update dependency rasterio to v1.2.6 (#6202)

Co-authored-by: Dan Lee <[email protected]>

Author: renovate-bot

dataflow/gpu-workers/requirements.txt

@@ -1,4 +1,4 @@
 Pillow==8.2.0
 apache-beam[gcp]==2.29.0
-rasterio==1.2.4
+rasterio==1.2.6
 tensorflow==2.5.0