[fix] issues reported by `make test.yamllint`

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: true
 contact_links:
-  - name: Questions & Answers (Q&A)
+  - name: "Questions & Answers (Q&A)"
     url: https://github.com/searxng/searxng/discussions/categories/q-a
     about: Ask questions and find answers

.github/workflows/checker.yml

@@ -1,5 +1,5 @@
 name: "Checker"
-on:
+on:  # yamllint disable-line rule:truthy
   schedule:
     - cron: "0 4 * * 5"
   workflow_dispatch:

.github/workflows/data-update.yml

@@ -1,5 +1,5 @@
 name: "Update searx.data"
-on:
+on:  # yamllint disable-line rule:truthy
   schedule:
     - cron: "59 23 28 * *"
   workflow_dispatch:

.github/workflows/integration.yml

@@ -1,6 +1,6 @@
 name: Integration
 
-on:
+on:  # yamllint disable-line rule:truthy
   push:
     branches: ["master"]
   pull_request:
@@ -119,7 +119,7 @@ jobs:
           BRANCH: gh-pages
           FOLDER: dist/docs
           CLEAN: true  # Automatically remove deleted files from the deploy branch
-        SINGLE_COMMIT: True
+          SINGLE_COMMIT: true
           COMMIT_MESSAGE: '[doc] build from commit ${{ github.sha }}'
 
   babel:

.github/workflows/security.yml

@@ -1,5 +1,5 @@
 name: "Security checks"
-on:
+on:  # yamllint disable-line rule:truthy
   schedule:
     - cron: "42 05 * * *"
   workflow_dispatch:

.github/workflows/translations-update.yml

@@ -1,5 +1,5 @@
 name: "Update translations"
-on:
+on:  # yamllint disable-line rule:truthy
   schedule:
     - cron: "05 07 * * 5"
   workflow_dispatch: