Fix injection of not injectable statements (#292)

- Fix injection of not injectable statements
- Fix CodeQl versioning
---------

Signed-off-by: Filip Vitkovský <filip.vitkovsky@pantheon.tech>

.github/workflows/codeql-analysis.yml

@@ -42,7 +42,7 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@v2
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -60,4 +60,4 @@ jobs:
       run: gradle build
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@v2

intelij-plugin/src/main/java/tech/pantheon/yanginator/plugin/injection/RegExpToYangInjector.java

@@ -17,6 +17,7 @@
 import com.intellij.psi.PsiLanguageInjectionHost;
 import com.intellij.psi.impl.source.resolve.reference.impl.providers.XsdRegExpParserDefinition;
 import org.jetbrains.annotations.NotNull;
+import tech.pantheon.yanginator.plugin.psi.YangIndentableQuotedString;
 import tech.pantheon.yanginator.plugin.psi.YangPatternBody;
 import tech.pantheon.yanginator.plugin.psi.YangQuotedString;
 
@@ -26,7 +27,7 @@ public class RegExpToYangInjector implements MultiHostInjector {
     @Override
     public void getLanguagesToInject(@NotNull MultiHostRegistrar registrar, @NotNull PsiElement context) {
         if (context instanceof YangQuotedString &&
-                context.getParent() != null &&
+                context.getParent() instanceof YangIndentableQuotedString &&
                 context.getParent().getParent() instanceof YangPatternBody) {
             registrar.startInjecting(XsdRegExpParserDefinition.LANGUAGE)
                     .addPlace(null, null, (PsiLanguageInjectionHost) context, new TextRange(context.getStartOffsetInParent() + 1, context.getStartOffsetInParent() + context.getTextLength() - 1))