rename file names with colons to the common notation (#8264)

The colons in file names break Windows compatibility and prevent Bluesky from being developed on Windows. (Regression: Bluesky Git repository always shows missing files on Windows #8263)

__e2e__/flows/report-dialog/post.default.yml

@@ -0,0 +1,24 @@
+appId: xyz.blueskyweb.app
+---
+- runScript:
+    file: ../../setupServer.js
+    env:
+        SERVER_PATH: ?users&follows&posts&feeds
+- runFlow:
+    file: ../../setupApp.yml
+- tapOn:
+    id: "e2eSignInAlice"
+
+- tapOn:
+    id: "postDropdownBtn"
+    index: 0
+- tapOn:
+    id: "postDropdownReportBtn"
+- tapOn:
+    id: "report:option:com.atproto.moderation.defs#reasonSpam"
+- assertVisible:
+    id: "report:labeler:mod-authority.test"
+- tapOn:
+    id: "report:submit"
+- assertNotVisible:
+    id: "report:dialog"