Bump unrolled/render to v1.1.0 (#15581) (#15608)

v1.1.0 has improved buffer pooling

vendor/github.com/unrolled/render/buffer.go

@@ -2,9 +2,6 @@ package render
 
 import "bytes"
 
-// bufPool represents a reusable buffer pool for executing templates into.
-var bufPool *BufferPool
-
 // BufferPool implements a pool of bytes.Buffers in the form of a bounded channel.
 // Pulled from the github.com/oxtoacart/bpool package (Apache licensed).
 type BufferPool struct {
@@ -39,8 +36,3 @@ func (bp *BufferPool) Put(b *bytes.Buffer) {
 	default: // Discard the buffer if the pool is full.
 	}
 }
-
-// Initialize buffer pool for writing templates into.
-func init() {
-	bufPool = NewBufferPool(64)
-}