Bypass markdownlint due to styling of headers

Signed-off-by: Travis Beckham <[email protected]>

linkerd.io/content/2.15/tasks/troubleshooting.md

@@ -870,8 +870,12 @@ $ curl "https://versioncheck.linkerd.io/version.json?version=edge-19.1.2&uuid=te
 
 Example failures:
 
+<!-- markdownlint-disable MD036 -->
+
 **unsupported version channel**
 
+<!-- markdownlint-enable MD036 -->
+
 ```bash
 ‼ cli is up-to-date
     unsupported version channel: stable-2.14.10
@@ -884,8 +888,12 @@ for details.
 
 See [the full list of Linkerd releases](/releases/) for ways to get Linkerd.
 
+<!-- markdownlint-disable MD036 -->
+
 **is running version X but the latest version is Y**
 
+<!-- markdownlint-enable MD036 -->
+
 ```bash
 ‼ cli is up-to-date
     is running version 19.1.1 but the latest edge version is 19.1.2
@@ -900,8 +908,12 @@ There is a newer version of the `linkerd` cli. See the page on
 
 Example failures:
 
+<!-- markdownlint-disable MD036 -->
+
 **unsupported version channel**
 
+<!-- markdownlint-enable MD036 -->
+
 ```bash
 ‼ control plane is up-to-date
     unsupported version channel: stable-2.14.10
@@ -914,8 +926,12 @@ for details.
 
 See [the full list of Linkerd releases](/releases/) for ways to get Linkerd.
 
+<!-- markdownlint-disable MD036 -->
+
 **is running version X but the latest version is Y**
 
+<!-- markdownlint-enable MD036 -->
+
 ```bash
 ‼ control plane is up-to-date
     is running version 19.1.1 but the latest edge version is 19.1.2