fix: remove pip caching from Gitea workflows to fix ETIMEDOUT errors

The Gitea Actions runner doesn't have access to pip cache storage,
causing 'reserveCache failed: connect ETIMEDOUT' errors.

Removed cache configuration from both:
- .gitea/workflows/lint.yml
- .gitea/workflows/update-badges.yml

Pip will download dependencies fresh on each run, which is acceptable
for CI workflows and avoids the timeout errors.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitea/workflows/lint.yml

@@ -17,8 +17,6 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: '3.12'
-          cache: 'pip'
-          cache-dependency-path: requirements-dev.txt
 
       - name: Install dev dependencies
         run: |

.gitea/workflows/update-badges.yml

@@ -22,8 +22,6 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: '3.12'
-          cache: 'pip'
-          cache-dependency-path: requirements-dev.txt
 
       - name: Install dev dependencies
         run: |