[FIX] conditional_formatting: fix cf type checkboxes

The checkboxes of the CF side panel weren't working properly if we clicked
right between the checkbox input and it's label. The state of the component
changed, but the checkbox wasn't checked.

This is because we used `t-attf-checked` to defined the state of the checkbox,
which returns a string instead of a boolean. Changed it to `t-att-checked`.

closes #2538

X-original-commit: 183d380
Signed-off-by: Lucas Lefèvre (lul) <lul@odoo.com>
Signed-off-by: Minne Adrien (adrm) <adrm@odoo.com>
Signed-off-by: Rémi Rahir (rar) <rar@odoo.com>

src/components/side_panel/conditional_formatting/conditional_formatting.xml

@@ -49,7 +49,7 @@
                 t-on-click="() => this.changeRuleType('CellIsRule')">
                 <input
                   class="form-check-input o_radio_input"
-                  t-attf-checked="{{state.currentCFType === 'CellIsRule'}}"
+                  t-att-checked="state.currentCFType === 'CellIsRule'"
                   type="radio"
                   id="cellIsRule"
                   name="ruleType"
@@ -62,7 +62,7 @@
                 t-on-click="() => this.changeRuleType('ColorScaleRule')">
                 <input
                   class="form-check-input o_radio_input"
-                  t-attf-checked="{{state.currentCFType === 'ColorScaleRule'}}"
+                  t-att-checked="state.currentCFType === 'ColorScaleRule'"
                   type="radio"
                   id="colorScaleRule"
                   name="ruleType"
@@ -78,7 +78,7 @@
                 t-on-click="() => this.changeRuleType('IconSetRule')">
                 <input
                   class="form-check-input o_radio_input"
-                  t-attf-checked="{{state.currentCFType === 'IconSetRule'}}"
+                  t-att-checked="state.currentCFType === 'IconSetRule'"
                   type="radio"
                   id="iconSetRule"
                   name="ruleType"