Minor fix of warnings in the documentation

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asciidoctor: WARNING: src/01_introduction_and_goals.adoc: line 40: unterminated table block

asciidoctor: WARNING: src/12_glossary.adoc: line 31: unterminated sidebar block

docs/src/01_introduction_and_goals.adoc

@@ -42,7 +42,7 @@ image::01_2_iso-25010-topics-EN.drawio.png["Categories of Quality Requirements"]
 |QG1|Usability|The user can easily navigate through the app and find the information they need
 |QG2|Performance|The app should be able to handle a large amount of users at the same time
 |QG3|Security|The user's data should be protected and not accesible by anyone else
-
+|===
 ****
 
 === Stakeholders
@@ -59,3 +59,5 @@ image::01_2_iso-25010-topics-EN.drawio.png["Categories of Quality Requirements"]
 |_Development Team_||_Acquire experience in the development process of Software Architecture and pass the subject to complete their studies_
 |_Users_|_Anyone who uses the app_|_Test their knowledge on a functional and easy to use quizz game app_
 |===
+
+****

docs/src/12_glossary.adoc

@@ -27,9 +27,9 @@ Potentially more columns in case you need translations.
 .Further Information
 
 See https://docs.arc42.org/section-12/[Glossary] in the arc42 documentation.
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 ****
-
+[role="arc42help"]
+****
 [cols="e,2e" options="header"]
 |===
 |Term |Definition
@@ -40,3 +40,5 @@ See https://docs.arc42.org/section-12/[Glossary] in the arc42 documentation.
 |<Term-2>
 |<definition-2>
 |===
+
+****