Bump filelock from 3.4.0 to 3.20.0 in /requirements

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.4.0 to 3.20.0.
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](tox-dev/filelock@3.4.0...3.20.0)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 3.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/requirements-prod.in

@@ -26,7 +26,7 @@ cryptography==44.0.1
 decorator==5.1.1
 dnspython==2.6.1
 executing==1.2.0
-filelock==3.4.0
+filelock==3.20.0
 flanker @ https://github.com/closeio/flanker-new/archive/fa272d95345d45e8bb1f9bc32bc2c074bf52a484.zip
 tld==0.12.6
 Flask==2.3.2

requirements/requirements-prod.txt

@@ -294,9 +294,9 @@ executing==1.2.0 \
     # via
     #   -r requirements-prod.in
     #   stack-data
-filelock==3.4.0 \
-    --hash=sha256:2e139a228bcf56dd8b2274a65174d005c4a6b68540ee0bdbb92c76f43f29f7e8 \
-    --hash=sha256:93d512b32a23baf4cac44ffd72ccf70732aeff7b8050fcaf6d3ec406d954baf4
+filelock==3.20.0 \
+    --hash=sha256:339b4732ffda5cd79b13f4e2711a31b0365ce445d95d243bb996273d072546a2 \
+    --hash=sha256:711e943b4ec6be42e1d4e6690b48dc175c822967466bb31c0c293f34334c13f4
     # via
     #   -r requirements-prod.in
     #   tldextract