update minimum go version to go1.26

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

cli-plugins/hooks/hook_types.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 hooks defines the contract between the Docker CLI and CLI plugin hook
 // implementations.

cli-plugins/hooks/template.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 hooks
 

cli-plugins/manager/error.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 manager
 

cli-plugins/manager/hooks.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 manager