docs: drop the upgrade ceiling headline from both READMEs

The paragraph below it already states what is pinned, why 12.2 / 0.8.0
are refused, and what the trade-off is; the one-line lead was redundant
and read as a judgement rather than a fact. No other change.

README.md

@@ -10,10 +10,10 @@
 > kept on the [`v1` branch](https://github.com/czcdr/dsh-plugin-rea/tree/v1) and on npm as `[email protected]`.
 > Full comparison: [Two lines: 1.x and 2.x](#two-lines-1x-and-2x) · upgrading: [Upgrading from 1.x](#upgrading-from-1x).
 
-> **How new can it get? This is the ceiling — going further breaks tools.** REA 6.7.0 accepts Ghidra
-> **12.1.x** only (12.2 is `unsupported`, and the whole Ghidra decompile/analysis group disappears) and the
-> jadx bridge **0.7.1** only (0.8.0 fails on its first call with `Expected engine 0.7.1`, before any APK is
-> loaded). JDK **21.0.13** is out upstream, but Adoptium ships no Windows build, so there is nothing to point
+> REA 6.7.0 accepts Ghidra **12.1.x** only (12.2 is `unsupported`, and the whole Ghidra decompile/analysis
+> group disappears) and the jadx bridge **0.7.1** only (0.8.0 fails on its first call with `Expected engine
+> 0.7.1`, before any APK is loaded). JDK **21.0.13** is out upstream, but Adoptium ships no Windows build, so
+> there is nothing to point
 > at here — and it drops only three of the four eMudhra anchors. The trade-off is therefore "all tools green,
 > CVE still open": Ghidra 12.1.4's CVE-2026-100504 / 100505 / 100503 / 113604 stay in the chain — **do not
 > analyse untrusted samples with this environment** — and the JDK still trusts the eMudhra anchors. Evidence,

README.zh-CN.md

@@ -10,7 +10,7 @@
 > [`v1` 分支](https://github.com/czcdr/dsh-plugin-rea/tree/v1)，npm 上仍是 `[email protected]`。
 > 完整对比：[两条线：1.x 与 2.x](#两条线1x-与-2x) · 升级：[从 1.x 升级](#从-1x-升级)。
 
-> **能升到多新？就到这儿 —— 再往上会掉工具。** REA 6.7.0 只认 Ghidra **12.1.x**（12.2 判 `unsupported`，
+> REA 6.7.0 只认 Ghidra **12.1.x**（12.2 判 `unsupported`，
 > Ghidra 系的反编译/分析工具整组消失）和 jadx 桥接 **0.7.1**（0.8.0 会在第一次调用就报
 > `Expected engine 0.7.1`，失败点在加载 APK 之前）。JDK **21.0.13** 上游已发，但 Adoptium 没给 Windows
 > 构建，本机无处可指，而且它只移除 4 个 eMudhra 锚里的 3 个。所以现在的取舍是「工具全绿、CVE 未清」：