[SH iOS] Roll deps to incorporate context matching

This rolls to the most recent version of the Text Fragments Polyfill
lib, which includes context-based matches (i.e., prefix/suffix params)
to improve robustness of URL generation.

Bug: 1153973
Change-Id: I6e8786655ee4b6662846365595a466a2c7523edc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566050Reviewed-by: sebsg <sebsg@chromium.org>
Commit-Queue: Tommy Martino <tmartino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832067}

DEPS

@@ -1479,7 +1479,7 @@ deps = {
     Var('swiftshader_git') + '/SwiftShader.git' + '@' +  Var('swiftshader_revision'),
 
   'src/third_party/text-fragments-polyfill/src': {
-    'url': Var('chromium_git') + '/external/github.com/GoogleChromeLabs/text-fragments-polyfill.git' + '@' + 'b2df6bf7b4dc1665989306a8119eb041f013f567',
+    'url': Var('chromium_git') + '/external/github.com/GoogleChromeLabs/text-fragments-polyfill.git' + '@' + '147e1b4038c1df82dc82455e1fa352ffcf1864a6',
     'condition': 'checkout_ios',
   },