Update to latest faas-provider

The scale and delete endpoints no-longer accept namespace
via the query string, but through the body.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/prometheus/procfs/fs.go

@@ -21,6 +21,7 @@ import (
 // kernel data structures.
 type FS struct {
 	proc fs.FS
+	real bool
 }
 
 // DefaultMountPoint is the common mount point of the proc filesystem.
@@ -39,5 +40,11 @@ func NewFS(mountPoint string) (FS, error) {
 	if err != nil {
 		return FS{}, err
 	}
-	return FS{fs}, nil
+
+	real, err := isRealProc(mountPoint)
+	if err != nil {
+		return FS{}, err
+	}
+
+	return FS{fs, real}, nil
 }