Rename :cow to :copy

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/pkg/config/mounts.go

@@ -7,5 +7,5 @@ type MountEntry struct {
 	Dest     string `yaml:"dest,omitempty"`
 	ReadOnly bool   `yaml:"readonly,omitempty"`
 	Options  string `yaml:"options,omitempty"` // ignored at the moment
-	Cow      bool   `yaml:"cow,omitempty"`     // copy the file into the container and don't remove if modified
+	Copy     bool   `yaml:"copy,omitempty"`    // temporarily copy the file into the container
 }