Revert "chore(changelog): normalize version headings by replacing hyphens with tildes"

This reverts commit a2a77a49b1.

cliff.toml

@@ -29,10 +29,10 @@ body = """
 
 {% if version %}\
     {% if previous.version %}\
-        ## [{{ version | trim_start_matches(pat="v") | replace(from="-", to="~") }}]\
+        ## [{{ version | trim_start_matches(pat="v") }}]\
           ({{ self::remote_url() }}/compare/{{ previous.version }}..{{ version }}) - {{ timestamp | date(format="%Y-%m-%d") }}
     {% else %}\
-        ## [{{ version | trim_start_matches(pat="v") | replace(from="-", to="~") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+        ## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
     {% endif %}\
 {% else %}\
     ## [unreleased]