Help button not launching the browser

@qainsights ([Bug 66249](https://bz.apache.org/bugzilla//show_bug.cgi?id=66249&redirect=false)):
Hi Team,

I am using JMeter 5.5 in Fedora 36 Workstation. Clicking on Help button on the Toolbar is not launching the default browser with the valid link.

Steps to reproduce:

1. Install JMeter 5.5 in Fedora 36
2. Install OpenJDK 11
3. Launch JMeter
4. Click on Help button on the Toolbar

Actual Result:

- No browser windows is launching with the help link

Expected Result:

- Default browser should be launched with the help link

Thank you,
NaveenKumar Namachivayam

Created attachment [Help-Button-Log.txt](https://apache.github.io/jmeter-bugzilla-attachments/49/66249/38383/Help-Button-Log.txt): JMeter Log Info
Help-Button-Log.txt

````
2022-09-03 11:28:06,536 DEBUG o.a.j.g.GuiPackage: Updating current node Test Plan
2022-09-03 11:28:06,537 DEBUG o.a.j.g.GuiPackage: Gui retrieved = org.apache.jmeter.control.gui.TestPlanGui[Test Plan,0,0,1142x493,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder@216bdde8,flags=9,maximumSize=,minimumSize=,preferredSize=]
2022-09-03 11:28:06,538 DEBUG o.a.j.g.AbstractJMeterGuiComponent: setting element to enabled: true
2022-09-03 11:28:06,538 DEBUG o.a.j.g.AbstractJMeterGuiComponent: setting element to enabled: true
2022-09-03 11:28:06,539 DEBUG o.a.j.g.GuiPackage: Gui retrieved = org.apache.jmeter.control.gui.TestPlanGui[Test Plan,0,0,1142x493,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder@216bdde8,flags=9,maximumSize=,minimumSize=,preferredSize=]
2022-09-03 11:28:06,540 DEBUG o.a.j.g.GuiPackage: Gui retrieved = org.apache.jmeter.control.gui.TestPlanGui[Test Plan,0,0,1142x493,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder@216bdde8,flags=9,maximumSize=,minimumSize=,preferredSize=]
2022-09-03 11:28:06,540 DEBUG o.a.j.g.GuiPackage: Updating current node Test Plan
2022-09-03 11:28:06,540 DEBUG o.a.j.g.GuiPackage: Gui retrieved = org.apache.jmeter.control.gui.TestPlanGui[Test Plan,0,0,1142x493,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder@216bdde8,flags=9,maximumSize=,minimumSize=,preferredSize=]
2022-09-03 11:28:06,541 DEBUG o.a.j.g.AbstractJMeterGuiComponent: setting element to enabled: true
2022-09-03 11:28:06,541 DEBUG o.a.j.g.AbstractJMeterGuiComponent: setting element to enabled: true
2022-09-03 11:28:06,541 DEBUG o.a.j.g.GuiPackage: Gui retrieved = org.apache.jmeter.control.gui.TestPlanGui[Test Plan,0,0,1142x493,invalid,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.border.EmptyBorder@216bdde8,flags=9,maximumSize=,minimumSize=,preferredSize=]

````

Severity: minor
OS: Linux