Fix link to headings with 2 tags (#844)

* test: Add sample heading with 2 tags, to test #842

* fix: Use global substitution to replace all # in headings

Fixes #842

Author: claremacrae

resources/sample_vaults/Tasks-Demo/Manual Testing/654 - Unable to find section, when title has tag inside.md

@@ -2,7 +2,7 @@
 
 - [Unable to find section, when title has tag inside · Issue #654 · obsidian-tasks-group/obsidian-tasks · GitHub](https://github.com/obsidian-tasks-group/obsidian-tasks/issues/654)
 
-## Section with tag in #example-tag
+## Section with tag in #example-tag and #another-tag
 
 - [ ] #task Task in section with tag in heading name
 

src/QueryRenderer.ts

@@ -297,7 +297,7 @@ class QueryRenderChild extends MarkdownRenderChild {
         }
 
         if (task.precedingHeader !== null) {
-            const sanitisedHeading = task.precedingHeader.replace('#', '');
+            const sanitisedHeading = task.precedingHeader.replace(/#/g, '');
             link.href = link.href + '#' + sanitisedHeading;
             link.setAttribute(
                 'data-href',