samples: net: http_server: use proper language in code-block

Achieve proper syntax highlighting using "console"
language when command snippets start with a prompt.

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

samples/net/sockets/http_server/README.rst

@@ -103,7 +103,7 @@ CPU Usage Profiling
 We can use ``perf`` to collect statistics about the CPU usage of our server
 running in native_sim board with the ``stat`` command:
 
-.. code-block:: bash
+.. code-block:: console
 
    $ sudo perf stat -p <pid_of_server>
 
@@ -117,14 +117,14 @@ Hotspot Analysis
 ``perf record`` and ``perf report`` can be used together to identify the
 functions in our code that consume the most CPU time:
 
-.. code-block:: bash
+.. code-block:: console
 
    $ sudo perf record -g -p <pid_of_server> -o perf.data
 
 After running our server under load (For example, using ApacheBench tool),
 we can stop the recording and analyze the data using:
 
-.. code-block:: bash
+.. code-block:: console
 
    $ sudo perf report -i perf.data
 
@@ -136,13 +136,13 @@ spending the most time.
 To do this, we need to convert the ``perf.data`` to a format that ``FlameGraph``
 can understand:
 
-.. code-block:: bash
+.. code-block:: console
 
    $ sudo perf script | ~/FlameGraph/stackcollapse-perf.pl > out.perf-folded
 
 And, then, generate the ``FlameGraph``:
 
-.. code-block:: bash
+.. code-block:: console
 
    $ ~/FlameGraph/flamegraph.pl out.perf-folded > flamegraph.svg