update minimum go version to go1.26

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cmd/docker-trust/internal/registry/config.go

@@ -1,5 +1,5 @@
 // FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
-//go:build go1.25
+//go:build go1.26
 
 package registry
 

cmd/docker-trust/internal/registry/errors.go

@@ -1,5 +1,5 @@
 // FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
-//go:build go1.25
+//go:build go1.26
 
 package registry
 

cmd/docker-trust/trust/inspect.go

@@ -1,5 +1,5 @@
 // FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
-//go:build go1.25
+//go:build go1.26
 
 package trust
 

cmd/docker/builder_test.go

@@ -1,5 +1,5 @@
 // FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
-//go:build go1.25
+//go:build go1.26
 
 package main
 

cmd/docker/docker.go

@@ -1,5 +1,5 @@
 // FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
-//go:build go1.25
+//go:build go1.26
 
 package main