Update README with new repository link (#519)

* Update README with new repository link

Update repository link to new location and remove warning.

* Update issue reference from google to cel-expr

Author: dmitriplotnikov

README.md

@@ -1,10 +1,5 @@
 # Common Expression Language
 
-> [!WARNING]
-> **On June 16, 2026, this repository will move to [github.com/cel-expr/cel-spec](https://github.com/cel-expr/cel-spec)!**
->
-> Please update your links and dependencies. See the [pinned issue](https://github.com/google/cel-spec/issues/513) for details.
-
 The Common Expression Language (CEL) implements common semantics for expression
 evaluation, enabling different applications to more easily interoperate.
 
@@ -52,7 +47,7 @@ highly recommended to serialize the type-checked expression as a protocol
 buffer. The CEL team will maintains canonical protocol buffers for ASTs and
 will keep these versions identical and wire-compatible in perpetuity:
 
-*  [CEL canonical](https://github.com/google/cel-spec/tree/master/proto/cel/expr)
+*  [CEL canonical](https://github.com/cel-expr/cel-spec/tree/master/proto/cel/expr)
 *  [CEL v1alpha1](https://github.com/googleapis/googleapis/tree/master/google/api/expr/v1alpha1)
 
 

tests/simple/testdata/parse.textproto

@@ -281,7 +281,7 @@ section {
     value: { string_value: " \r " }
   }
 
-  # See https://github.com/google/cel-spec/issues/490
+  # See https://github.com/cel-expr/cel-spec/issues/490
   # test {
   #   name: "triple_single_quoted_unescaped_carriage_return"
   #   expr: "''' \r '''"
@@ -315,7 +315,7 @@ section {
     value: { string_value: " \r\n " }
   }
 
-  # See https://github.com/google/cel-spec/issues/490
+  # See https://github.com/cel-expr/cel-spec/issues/490
   # test {
   #   name: "triple_single_quoted_unescaped_windows_line_end"
   #   expr: "''' \r\n '''"
@@ -730,7 +730,7 @@ section {
     value: { bytes_value: " \r " }
   }
 
-  # See https://github.com/google/cel-spec/issues/490
+  # See https://github.com/cel-expr/cel-spec/issues/490
   # test {
   #   name: "triple_single_quoted_unescaped_carriage_return"
   #   expr: "b''' \r '''"
@@ -764,7 +764,7 @@ section {
     value: { bytes_value: " \r\n " }
   }
 
-  # See https://github.com/google/cel-spec/issues/490
+  # See https://github.com/cel-expr/cel-spec/issues/490
   # test {
   #   name: "triple_single_quoted_unescaped_windows_line_end"
   #   expr: "b''' \r\n '''"