Add a disclaimer about CentOS for YUM install (#15453) (#15515)

* update step 3

* fix formatting

* fix formatting

* fix formatting

* test formatting

* change code to use sphinx directives

* fix formatting

* test formatting

* test formatting

* rewording

* test formatting

* test formatting

* test formatting

* move content to troubleshooting guide

* fix formatting

* fixes

* remove troubleshooting item and add a disclaimer

* add centos 7

docs/install_guides/installing-openvino-yum.md

@@ -1,4 +1,4 @@
-# Install OpenVINO™ Runtime on Linux Using YUM Repository {#openvino_docs_install_guides_installing_openvino_yum}
+# Install OpenVINO™ Runtime on Linux From YUM Repository {#openvino_docs_install_guides_installing_openvino_yum}
 
 @sphinxdirective
 
@@ -22,6 +22,10 @@ Installing OpenVINO Runtime from YUM is recommended for C++ developers. If you a
    | Full requirement listing is available in:
    | `System Requirements Page <https://www.intel.com/content/www/us/en/developer/tools/openvino-toolkit/system-requirements.html>`_
 
+   .. note::
+
+      Installing OpenVINO from YUM is only supported on RHEL 8.2 and higher versions. CentOS 7 is not supported for this installation method.
+
 .. tab:: Processor Notes
 
    Processor graphics are not included in all processors.
@@ -41,8 +45,12 @@ Installing OpenVINO Runtime from YUM is recommended for C++ developers. If you a
 
 ### Step 1: Set Up the Repository
 
-1. Create the `openvino-2022.repo` YUM repo file in the `/tmp` directory as a normal user:
+@sphinxdirective
-   ```
+
+1. Create a YUM repository file (`openvino-2022.repo`) in the `/tmp` directory as a normal user:
+
+   .. code-block:: sh
+
       tee > /tmp/openvino-2022.repo << EOF
       [OpenVINO]
       name=Intel(R) Distribution of OpenVINO 2022
@@ -52,23 +60,25 @@ Installing OpenVINO Runtime from YUM is recommended for C++ developers. If you a
       repo_gpgcheck=1
       gpgkey=https://yum.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS.PUB
       EOF
-   ```
+
-2.	Move the new `openvino-2022.repo` file to the YUM configuration directory `/etc/yum.repos.d`:
+2. Move the new `openvino-2022.repo` file to the YUM configuration directory, i.e. `/etc/yum.repos.d`:
-   ```sh
+   
+   .. code-block:: sh
+
       sudo mv /tmp/openvino-2022.repo /etc/yum.repos.d
-   ```
+
-3.	Verify that the new repo is properly setup by running the following command:
+3. Verify that the new repository is set up properly.
-   ```sh
+
+   .. code-block:: sh
+
       yum repolist | grep -i openvino
-   ```
+
    You will see the available list of packages.
 
 
 To list available OpenVINO packages, use the following command:
 
-@sphinxdirective
+.. code-block:: sh
-
-   .. code-block:: sh
 
    yum list 'openvino*'
 
@@ -106,11 +116,11 @@ To list available OpenVINO packages, use the following command:
 
 #### Check for Installed Packages and Version
 
-Run the following command:
-
 @sphinxdirective
 
-   .. code-block:: sh
+Run the following command:
+
+.. code-block:: sh
 
    yum list installed 'openvino*'
 
@@ -135,10 +145,10 @@ To enable the toolkit components to use processor graphics (GPU) on your system,
 
 ### Step 5: Build Samples
 
-To build the C++ or C sample applications for Linux, run the `build_samples.sh` script:
-
 @sphinxdirective
 
+To build the C++ or C sample applications for Linux, run the `build_samples.sh` script:
+
 .. tab:: C++
 
    .. code-block:: sh