test: assert the full confirmation titles instead of substrings

The two CodeLens confirmation tests used partial assertions: `includes('3.12.4')`
and `!includes('(')`. Both are weak -- the first passes on any message that merely
contains the version, and the second only asserts the absence of a character, so it
verified nothing about the versionless text at all.

Both now assert the complete localized title with assert.strictEqual. Confirmed
load-bearing by mutation: renaming the message to "Script env ready" leaves both
old assertions green while both new ones fail.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: StellaHuang95

src/test/features/inlineScript/codeLens.unit.test.ts

@@ -102,7 +102,7 @@ suite('Inline script CodeLens provider', () => {
             const lenses = provider.provideCodeLenses(makeDocument(scriptUri), {} as never);
 
             assert.strictEqual(lenses.length, 1);
-            assert.ok(lenses[0].command?.title.includes('3.12.4'), lenses[0].command?.title);
+            assert.strictEqual(lenses[0].command?.title, 'Script environment ready (Python 3.12.4)');
             assert.strictEqual(lenses[0].command?.command, '', 'the confirmation must not be clickable');
         });
 
@@ -112,7 +112,7 @@ suite('Inline script CodeLens provider', () => {
             const lenses = provider.provideCodeLenses(makeDocument(scriptUri), {} as never);
 
             assert.strictEqual(lenses.length, 1);
-            assert.ok(!lenses[0].command?.title.includes('('), lenses[0].command?.title);
+            assert.strictEqual(lenses[0].command?.title, 'Script environment ready');
         });
 
         test('expires on its own and refreshes so the lens disappears', () => {