Changed v14 package name in install example

Per comment from Ton Machielsen in docs Slack channel: https://edb.slack.com/archives/CU5QEU5L7/p1669116950090219

.github/workflows/sonarqube-scan.yml

@@ -16,7 +16,7 @@ jobs:
           ref: '${{ github.head_ref }}'
     
       - name: Checkout GitHub Action Repo
-        uses: actions/checkout@v3.3.0
+        uses: actions/checkout@master
         with:
           repository: EnterpriseDB/edb-github-actions.git
           ref: master

doc/install-packages.xml

@@ -112,7 +112,7 @@ sudo dnf repolist</programlisting>
           <para>
             Install the &repmgr; version appropriate for your PostgreSQL version (e.g. <literal>repmgr14</literal>):
             <programlisting>
-sudo dnf install repmgr14</programlisting>
+sudo dnf install repmgr_14</programlisting>
           </para>
           <tip>
             <para>