feat: bump spanner client to v1.53.1

Previous version includes a potential nil pointer
exception.

See [issue](googleapis/google-cloud-go#9048) and [fix](googleapis/google-cloud-go#9052) for more information.

go.mod

@@ -4,7 +4,7 @@ go 1.20
 
 require (
 	cloud.google.com/go v0.111.0
-	cloud.google.com/go/spanner v1.53.0
+	cloud.google.com/go/spanner v1.53.1
 	github.com/google/go-cmp v0.6.0
 	github.com/stoewer/go-strcase v1.3.0
 	go.einride.tech/aip v0.65.0

go.sum

@@ -9,8 +9,8 @@ cloud.google.com/go/iam v1.1.3 h1:18tKG7DzydKWUnLjonWcJO6wjSCAtzh4GcRKlH/Hrzc=
 cloud.google.com/go/iam v1.1.3/go.mod h1:3khUlaBXfPKKe7huYgEpDn6FtgRyMEqbkvBxrQyY5SE=
 cloud.google.com/go/longrunning v0.5.2 h1:u+oFqfEwwU7F9dIELigxbe0XVnBAo9wqMuQLA50CZ5k=
 cloud.google.com/go/longrunning v0.5.2/go.mod h1:nqo6DQbNV2pXhGDbDMoN2bWz68MjZUzqv2YttZiveCs=
-cloud.google.com/go/spanner v1.53.0 h1:/NzWQJ1MEhdRcffiutRKbW/AIGVKhcTeivWTDjEyCCo=
-cloud.google.com/go/spanner v1.53.0/go.mod h1:liG4iCeLqm5L3fFLU5whFITqP0e0orsAW1uUSrd4rws=
+cloud.google.com/go/spanner v1.53.1 h1:xNmE0SXMSxNBuk7lRZ5G/S+A49X91zkSTt7Jn5Ptlvw=
+cloud.google.com/go/spanner v1.53.1/go.mod h1:liG4iCeLqm5L3fFLU5whFITqP0e0orsAW1uUSrd4rws=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/census-instrumentation/opencensus-proto v0.4.1 h1:iKLQ0xPNFxR/2hzXZMrBo8f1j86j5WHzznCCQxV/b8g=