chore(deps): bump e2e fixture manifests

Closes the open Dependabot PRs against the e2e test fixtures. axios went to
the current latest (1.16.1) rather than Dependabot's 1.16.0 target:

- tests/e2e/fixtures/simple-npm:  axios    1.15.0 -> 1.16.1  (closes #209)
- tests/e2e/fixtures/simple-pypi: requests 2.31.0 -> 2.33.0  (closes #187)
- tests/e2e/fixtures/simple-pypi: flask    3.0.0  -> 3.1.3   (closes #186)

These fixtures were stale rather than intentionally pinned. Socket Firewall
verified the install paths. The new .github/dependabot.yml intentionally
excludes tests/e2e/fixtures/** from future auto-bumps.

Signed-off-by: lelia <2418071+lelia@users.noreply.github.com>

Author: lelia

tests/e2e/fixtures/simple-npm/package.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "lodash": "4.18.1",
     "express": "4.22.0",
-    "axios": "1.15.0"
+    "axios": "1.16.1"
   },
   "devDependencies": {
     "typescript": "5.0.4",

tests/e2e/fixtures/simple-pypi/requirements.txt

@@ -1,3 +1,3 @@
-requests==2.31.0
-flask==3.0.0
+requests==2.33.0
+flask==3.1.3
 pyyaml==6.0.1