chore(deps): update dependency google-cloud-spanner to v3.56.0

Author: renovate-bot

requirements.txt

@@ -144,9 +144,9 @@ google-cloud-core==2.4.3 \
     --hash=sha256:1fab62d7102844b278fe6dead3af32408b1df3eb06f5c7e8634cbd40edc4da53 \
     --hash=sha256:5130f9f4c14b4fafdff75c79448f9495cfade0d8775facf1b09c3bf67e027f6e
     # via google-cloud-spanner
-google-cloud-spanner==3.55.0 \
-    --hash=sha256:bec170c6619f667cc657e977f87391d76975559be70b155d90a2902613662b3c \
-    --hash=sha256:fc9f717b612924f5e9bfae9514aa0d5cd30e6b40e8d472d030f84b16de2c18fe
+google-cloud-spanner==3.56.0 \
+    --hash=sha256:64f732a44f6a2892b5cc3be88e6e2cc92b5e52db883d1e946e1e3ff93c9745f0 \
+    --hash=sha256:bf7e4359d2f2148eda18a11f909813d07e794347a02f56dfbbd544418d30e5b2
     # via -r requirements.in
 googleapis-common-protos[grpc]==1.70.0 \
     --hash=sha256:0e1b44e0ea153e6594f9f394fef15193a68aaaea2d843f83e2742717ca753257 \