fix content-type of response for `/commit`

Signed-off-by: Tobias Gesellchen <tobias@gesellix.de>

docs/reference/api/docker_remote_api_v1.12.md

@@ -1287,7 +1287,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.13.md

@@ -1276,7 +1276,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.14.md

@@ -1286,7 +1286,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.15.md

@@ -1437,7 +1437,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.16.md

@@ -1394,7 +1394,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.17.md

@@ -1557,7 +1557,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.18.md

@@ -1677,7 +1677,7 @@ Create a new image from a container's changes
 **Example response**:
 
         HTTP/1.1 201 Created
-        Content-Type: application/vnd.docker.raw-stream
+        Content-Type: application/json
 
         {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.19.md

@@ -1734,7 +1734,7 @@ Create a new image from a container's changes
 **Example response**:
 
     HTTP/1.1 201 Created
-    Content-Type: application/vnd.docker.raw-stream
+    Content-Type: application/json
 
     {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.20.md

@@ -1876,7 +1876,7 @@ Create a new image from a container's changes
 **Example response**:
 
     HTTP/1.1 201 Created
-    Content-Type: application/vnd.docker.raw-stream
+    Content-Type: application/json
 
     {"Id": "596069db4bf5"}
 

docs/reference/api/docker_remote_api_v1.21.md

@@ -1968,7 +1968,7 @@ Create a new image from a container's changes
 **Example response**:
 
     HTTP/1.1 201 Created
-    Content-Type: application/vnd.docker.raw-stream
+    Content-Type: application/json
 
     {"Id": "596069db4bf5"}