fix caption for muscle pain symptom

Author: obinna-h-n

sormas-api/src/main/resources/captions.properties

@@ -2972,7 +2972,7 @@ Symptoms.meningealSigns=Meningeal Signs
 Symptoms.meningoencephalitis=Meningoencephalitis
 Symptoms.microcephaly=Microcephaly
 Symptoms.midUpperArmCircumference=Mid-upper arm circumf. (cm)
-Symptoms.musclePain=Muscle pain
+Symptoms.musclePain=Myalgia
 Symptoms.nausea=Nausea
 Symptoms.neckStiffness=Stiff neck
 Symptoms.noseBleeding=Nose bleed (epistaxis)